Picture this: your team is putting together a big client presentation. One person is working on the intro slides, someone else is handling the data section, and your designer is tweaking the visuals. Three people working on one deck should get it done faster. Instead, you end up with three different versions of the file, nobody knows which one is current, and someone overwrites an hour of work right before the deadline.
If that sounds painfully familiar, you’re not alone. Version chaos is one of the most common productivity killers for teams who collaborate on presentations, and it’s usually not a skill problem. It’s a setup problem.
The good news is that PowerPoint’s collaboration tools in 2026—when configured correctly—genuinely solve this. This guide walks through how co-authoring actually works, what the common pitfalls are, and how to run a smooth team workflow from the very first slide to the final share.
These collaboration capabilities represent some of the most significant advanced features of Microsoft PowerPoint that many users haven’t fully explored yet.
Why Teams Struggle With PowerPoint Collaboration (And Why It’s Not Your Fault)
Most people learned to use PowerPoint the old way: build a deck, save it, email it around, wait for feedback, get confused by which version came back. That workflow was fine when one person owned a presentation start to finish. It breaks down the moment a team tries to work on the same file at the same time.
The version problem is sneaky. It doesn’t announce itself. Someone saves a copy to their desktop. Someone else downloads from email. Someone uploads a revised version to a shared folder that already has two other copies sitting in it. Nobody is trying to cause chaos. It just happens.
Here is what makes PowerPoint collaboration genuinely different from working in Google Slides: PowerPoint has deeper formatting control, more design features, and remains the standard in most enterprise and professional environments. But it was built primarily as a desktop app, and its collaboration architecture reflects that history. Understanding how the co-authoring system actually works is the first step to using it well.
The core insight: PowerPoint co-authoring is not automatic. It requires specific conditions—the right file format, the right storage location, and the right settings turned on. Get those three things right, and the experience is genuinely smooth. Get any one of them wrong, and you’re back to version chaos.
Among the many features of Microsoft PowerPoint, real-time collaboration has become the one that separates productive teams from frustrated ones. Learning how it works matters more than learning any individual design trick.
How PowerPoint Co-Authoring Actually Works in 2026
Real-time co-authoring in PowerPoint means multiple people can open the same presentation simultaneously and see each other’s changes as they happen—like watching someone else’s cursor move around a shared document. Microsoft calls this co-authoring, and it works across the desktop app, the web version, and mobile.
The Three Requirements (All Three Are Non-Negotiable)
Before anyone can co-author, three things need to be true:
1. The file must be saved to OneDrive, OneDrive for Business, or SharePoint Online. Local files—including files sitting in a synced OneDrive folder that haven’t fully uploaded—do not support real-time co-authoring. The file needs to live in the cloud, not on someone’s hard drive.
2. The file must be in .pptx format. Older .ppt files do not support co-authoring. Neither do password-protected files, files with IRM (Information Rights Management) restrictions, or presentations that have been checked out in SharePoint. If your team is still working with older file formats, conversion is the first fix.
3. AutoSave must be turned on. This is the one people miss most often. AutoSave is the toggle in the upper-left corner of the PowerPoint window. When it’s off, your edits don’t sync to your collaborators until you manually save—which means they’re working blind to your changes. Slide it on before you start, and keep it on.
Quick check before you start: File in OneDrive or SharePoint? Saved as .pptx? AutoSave slider set to On? If all three are yes, you’re ready to collaborate. If any are no, fix that first.
What You Actually See When Co-Authoring
Once everything is configured, the experience looks like this: you open the presentation and see colored flags or avatar icons on slides in the thumbnail panel, indicating where your teammates are working. If someone is editing a text box on slide 4, you’ll see their name appear on that object. Changed slides get highlighted in turquoise in the thumbnail pane—a visual cue that something on that slide was recently updated.
You and your collaborators work on different sections simultaneously, not taking turns. If two people edit different slides or different objects on the same slide, the changes merge automatically when AutoSave syncs. Conflict occurs when two people edit the same text box at the same time—more on how to handle that shortly.
The in-app chat feature (available in Microsoft 365 versions) lets you communicate with collaborators without leaving PowerPoint, which is genuinely useful for quick decisions without jumping to a separate Teams window.
Step-by-Step: Setting Up Your First Collaborative Presentation
Step 1 — Save Your File to the Cloud First
Before you invite anyone, get the file into the right location. Open PowerPoint, go to File → Save As, and choose your OneDrive or SharePoint location. If your organization uses SharePoint team sites for project collaboration, that’s usually the better choice than personal OneDrive—it keeps the file tied to the project rather than one person’s account.
Tip: If you’re starting from scratch, create the file directly in SharePoint or OneDrive from the web interface, then open it in the desktop app. This ensures the file is in the cloud from the very beginning.
Step 2 — Share With the Right Permissions
Click the Share button in the upper-right corner of PowerPoint. You’ll get two options: sharing by email (where you type in collaborators’ addresses directly) or generating a shareable link.
The permission setting matters more than most people realize:
- Can edit: Full access to make changes, add slides, delete content, or modify the master theme. Use for your core team.
- Can view: Read-only access for stakeholders reviewing rather than building—your client, your manager, your legal team. Prevents accidental changes.
A practical workflow that works well for many teams: Set the initial share to edit access for the core team, then share a separate view-only link for review stakeholders once the deck reaches a review-ready state.
Step 3 — Establish Your Team’s Section Ownership
This is the human side of collaboration that no software feature can replace. Before people start editing, agree on who owns which slides. PowerPoint’s Sections feature (right-click in the slide panel to add a section) lets you group slides by owner or topic, creating a natural visual boundary for where each person is working.
Name your sections clearly—not just by slide number but by owner or topic: “Market Overview (Alex),” “Financial Model (Priya),” “Executive Summary (Jordan).” This makes the division of work visible to everyone and dramatically reduces the chance of two people editing the same content simultaneously.
Step 4 — Set a Shared Theme Before Anyone Starts
One of the most common sources of visual inconsistency in co-authored presentations is people using different fonts, colors, or layout styles. The solution is to establish a Slide Master before collaborative editing begins.
Go to View → Slide Master and lock in the fonts, color palette, and placeholder layouts your team will use. Once the master is set, add your team members to the file. When everyone builds on the same foundation, the final product looks like one person made it rather than a committee.
For a deeper exploration of PowerPoint’s design and formatting capabilities, our guide on mastering presentations through PowerPoint’s advanced capabilities covers layout techniques that pair well with collaborative workflows.
Version Control in PowerPoint: Your Safety Net Explained
Version control is the part of PowerPoint collaboration that most people don’t discover until something goes wrong. At that point, they either find it just in time and breathe a sigh of relief, or they don’t know it exists and lose real work.
PowerPoint does not have a traditional track changes feature like Microsoft Word. There is no Accept/Reject button for every individual edit. What it does have is a combination of tools that together give you a strong safety net—if you know how to use them.
Version History: Your Time Machine
Every file stored in OneDrive or SharePoint automatically keeps a version history. To access it, go to File → Info → Version History (or click the file name in the title bar in newer versions). You’ll see a timestamped list of every saved state of the file, who edited it, and when.
You can:
- Open any historical version as a read-only copy
- Compare it against the current file
- Restore it if needed (the restoration is immediate and reversible)
Best practice: Before any major round of editing—a significant redesign, a content overhaul, adding a new section—name a version checkpoint. Go to File → Info → Version History, and save a copy with a clear name like “Pre-Redesign-Feb2026.” This gives you a clean rollback point if the edits go sideways.
The Compare Feature: Spotting the Differences
The Review tab in PowerPoint includes a Compare feature that lets you open two versions of a file side by side and see what changed between them. Unlike Word’s Track Changes, this works at the presentation level rather than in real time—it’s most useful when you want to audit what changed between a baseline version and a current one.
One caveat worth knowing: Compare catches text edits more reliably than design or layout changes. If someone moved a logo, resized an image, or changed a color, those differences may not surface as clearly as text modifications. For design reviews, visual comparison or detailed version notes in the file’s comments are more reliable.
Comments and Tasks: Discussing Without Editing
Sometimes the best way to manage a revision round is to separate the discussion phase from the editing phase. PowerPoint’s Comments panel (accessible from the Review tab or the speech bubble icon) lets collaborators leave feedback on specific slides, respond to each other’s comments, and mark discussions as resolved.
The newer Task feature takes this further—a Task is a comment with an assignee and a status, so you can track revision requests the way you’d track action items in a project management tool. For teams dealing with multiple rounds of feedback from different stakeholders, this is much cleaner than trying to decode a chain of tracked edits.
Handling Conflicts: What to Do When Edits Clash
Even with great process, conflicts happen. Two people type in the same text box. Someone edits a slide while another person is mid-revision on the same element. Here’s how PowerPoint handles it and what you should do.
How Automatic Merging Works
When AutoSave syncs and two people have made non-conflicting changes—editing different slides, different text boxes, different objects—PowerPoint merges them automatically. You don’t have to do anything. The merged result appears in both collaborators’ views.
This is where working on separate slides or clearly divided sections pays off. If your team is genuinely editing different parts of the deck, you’ll rarely see a conflict dialog at all.
When Conflicts Require Your Input
A conflict occurs when two people edit the exact same element—typically the same text box on the same slide. When you save (or when AutoSave triggers a sync), PowerPoint surfaces a comparison: your version on one side, the other person’s version on the other. You choose which to keep.
The interface walks you through each conflict with Next and Previous navigation buttons. If multiple conflicts share the same resolution pattern, there’s a checkbox to apply the same choice to all remaining conflicts at once.
Practical tip from teams that co-author heavily: Stay out of each other’s text boxes. It sounds obvious, but in practice, two people fixing typos on the same slide at the same time creates more conflicts than any other single behavior. Use the Comments panel to flag edits you want someone else to make rather than jumping into their slide while they’re in it.
Recovering Lost Work After a Conflict
If a conflict resolution didn’t go the way you intended—someone’s work got overwritten—don’t panic. Go to Version History immediately. Because OneDrive and SharePoint keep frequent snapshots during active editing sessions, you’ll almost always find the content you need in a parallel version from a few minutes earlier. Copy what you need from the historical version and paste it into the current file.
The Offline Editing Problem
If a collaborator edits the file while offline—on a plane, in a spotty-signal environment, or with the OneDrive sync paused—their changes sync when they reconnect. If others were editing the same sections during that time, conflict resolution becomes more involved because the offline edits accumulated without real-time merging.
The practical fix: If someone knows they’ll be offline, ask them to either download their specific slides to work on locally and paste back in later, or to avoid editing sections other team members are actively working on. The comment system is a good coordination tool here—leave a note that you’re going offline and what you’ll be working on.
OneDrive vs SharePoint for PowerPoint Collaboration: Which One to Use
Both OneDrive and SharePoint support PowerPoint co-authoring, but they serve different collaboration contexts. Choosing the right one upfront saves permission headaches later.
| Factor | OneDrive | SharePoint |
|---|---|---|
| Best for | Personal files shared temporarily | Team or project files owned by the group |
| Ownership | File stays in your personal storage | File belongs to the team/site |
| Permissions | You manage access individually | Managed at the team level |
| Version history | 500 versions per file (default) | Configurable; up to 50,000 major versions |
| Best use case | One-off decks, personal projects | Ongoing team presentations, client deliverables |
| Integration with Teams | Works, but requires sharing link | Native—files accessible directly in channels |
For most professional team use, SharePoint is the stronger choice. When a presentation lives in a SharePoint document library tied to a Teams channel, every team member can access it from Teams, from the web browser, and from the desktop app—without needing to be sent a link every time.
The file also doesn’t disappear from the team’s access when someone leaves the organization or changes roles, which is a real issue with OneDrive-hosted files.
Third-party cloud storage: If your team uses Dropbox, Box, or Egnyte, you can co-author PowerPoint files stored in those platforms through Microsoft 365 for the web. The experience works, but you lose some features available in the native OneDrive/SharePoint integration. Google Drive is not supported for co-authoring.
The 2026 Angle: How Copilot Changes the Collaboration Game
Microsoft has been rolling out significant Copilot AI features across PowerPoint through late 2025 and into 2026, and several directly affect how teams collaborate—not just how individuals build slides. These represent some of the most notable PowerPoint advanced features introduced in recent years.
For a broader view of how AI is reshaping Microsoft productivity tools, our overview of AI features in Microsoft 365 and how they transform workflows provides additional context.
Agent Mode in PowerPoint (Rolling Out February 2026)
Agent Mode is Microsoft’s new AI capability for PowerPoint that goes beyond simple prompts. Instead of asking Copilot to make a single change, Agent Mode works alongside you through multi-step editing tasks—revising layouts across multiple slides, applying brand consistency, cleaning up content—while you watch and can intervene or redirect at any point.
For collaboration specifically, this means a team member who owns the review stage can use Agent Mode to apply a batch of agreed-upon changes across a full deck without manually touching every slide. Think of it as delegating a revision pass to an AI reviewer that follows your direction.
Enterprise Asset Integration via SharePoint Organization Asset Library
When you create slides with Copilot and your organization has set up a SharePoint Organization Asset Library (OAL), Copilot now pulls from that library automatically when generating slides. This means AI-generated content uses your organization’s approved logos, images, and visual assets—not generic stock images.
For teams that struggle to maintain brand consistency across collaborators, this is a meaningful improvement. Instead of reminding everyone to use the right brand kit, the AI tool defaults to the approved assets.
Copilot in View-Only Mode
Starting in January 2026, stakeholders viewing a presentation in read-only mode can use Copilot to query the deck—asking questions about the content, requesting summaries, or getting explanations of specific slides—without needing edit permissions.
This is useful in review workflows where a stakeholder doesn’t need to edit but does need to understand the presentation deeply. Instead of scheduling a walkthrough meeting, reviewers can interact with the deck directly.
Deep Citations for AI-Generated Content
For governed and compliance-focused teams, a February 2026 rollout brings deep citations to Copilot responses in PowerPoint and Word. AI-generated content links directly back to the source material it was derived from, making it easier to verify accuracy before a presentation goes to stakeholders.
Presentation Delivery: Looping, Sharing, and Display Options
Once your collaborative presentation is complete, delivery settings determine how audiences experience it. Several of PowerPoint’s presentation features deserve attention here because they directly follow the collaboration workflow.
Setting Up a Looping Slideshow
For kiosk displays, trade show presentations, or lobby screens, you’ll want your presentation to loop continuously without manual intervention. This is one of the most commonly searched PowerPoint features, and the setup is straightforward.
Our dedicated guide on how to loop a slideshow in PowerPoint walks through the complete process, including how to set automatic timing for each slide and configure the presentation to repeat indefinitely. If you’re building a collaborative deck destined for an auto-playing display, establish the loop timing and transition settings before sharing with your team so everyone works within the same presentation structure.
Preparing Slides for Visual Impact
Before sharing a finalized presentation, clean up visual elements that might distract from your message. Two common tasks:
- Background removal: When placing product photos or team headshots on slides, removing cluttered backgrounds creates a professional look. Our tutorial on how to remove the background of a photo in PowerPoint covers this built-in feature.
- Consistent formatting: Lock down your Slide Master before the collaboration phase, but do a final formatting check after everyone’s edits are merged. Font substitution, misaligned objects, and inconsistent bullet styles are the most common visual issues in co-authored decks.
Team Workflow Playbooks: What Actually Works
The features are only as useful as the process around them. Here are three workflow patterns that work well for different team contexts.
Playbook 1: The Parallel Build (Large Team, Defined Sections)
Best for: Teams of 4 or more building a deck with clear structural sections.
- One person creates the master file, uploads to SharePoint, and sets up the Slide Master with the team’s theme.
- Slides are organized into named Sections by owner. Each person is assigned specific sections.
- Everyone works simultaneously in the desktop app with AutoSave on.
- Comments are used to flag questions or cross-section dependencies rather than reaching into someone else’s slides.
- A designated “deck lead” does a consolidation pass before the final review, checking for consistency across sections.
Key rule: During active parallel editing, no one touches slides outside their assigned section without leaving a comment first. This sounds like a lot of process, but it prevents the single most common source of lost work.
Playbook 2: The Sequential Review (Approval-Gated Editing)
Best for: Client-facing decks or high-stakes presentations where version integrity is critical.
- One author builds the initial draft. All others are set to Can view during the build phase.
- When ready for review, permissions are updated to Can edit for the core review team.
- Reviewers use Comments and Tasks to flag changes rather than editing directly.
- The author reviews all comments, applies accepted changes, and marks tasks as complete.
- A final version is named in Version History and shared as a view-only link for stakeholder sign-off.
Playbook 3: The Async Remote Team (Across Time Zones)
Best for: Geographically distributed teams where real-time overlap is limited.
- The deck lives in a Teams-connected SharePoint channel, accessible from the Teams Files tab.
- Each team member has a designated work window. Handoff notes are left in slide Comments for the next person picking up.
- Version History is used as a daily log—the last person editing before end of their day saves a named version.
- A brief synchronous check-in (15 minutes is usually enough) is held once the deck reaches review stage to resolve any conflicts or decisions that couldn’t be handled async.
- Copilot’s summarization feature briefs incoming editors on what changed since their last session.
Sharing PowerPoint Presentations Outside Your Organization
Internal collaboration is one thing. Sharing with external clients, partners, or stakeholders introduces different considerations around access control, version integrity, and presentation experience.
Sharing Options for External Recipients
- View-only shareable link: The simplest option for read-only sharing. Generate a link in the Share panel and set permissions to Can view. Recipients don’t need a Microsoft account to view—they can open the file in their browser through PowerPoint for the web.
- Download a copy: If you want recipients to have a standalone file that doesn’t stay connected to your live version, export or send a copy. This breaks the live-sync link, which is usually the right choice for final deliverables to clients.
- Export as PDF: For a presentation that needs to be viewed exactly as you designed it—regardless of the recipient’s fonts, software version, or system settings—PDF is the most reliable format. Animations and transitions won’t work, but the visual fidelity is guaranteed.
- Expiring links: For time-sensitive sharing, SharePoint lets you set an expiration date on links. After the date passes, the link stops working. This is useful for RFP responses, confidential drafts, or presentations you don’t want circulating indefinitely.
What External Recipients See
When an external person opens a shared PowerPoint link, they see the presentation in PowerPoint for the web. The experience is clean and functional for review purposes, including comments. If they have a Microsoft account and edit permissions, they can also co-author from this view.
If they open the link without a Microsoft account, they’ll see a view-only version in the browser. They cannot edit, leave comments, or co-author.
Troubleshooting: When Co-Authoring Breaks Down
Even with the right setup, collaboration can hit snags. Here are the most common problems and what actually fixes them.
Problem: Collaborators Cannot See Your Changes
Almost always an AutoSave issue. Check that AutoSave is toggled on (upper-left corner). If it was off and you’ve been editing, your changes haven’t been syncing. Turn it on and wait for the first sync. Also confirm the file is genuinely saved to OneDrive or SharePoint—not a local folder that might look like a cloud sync location.
Problem: Constant Conflict Dialogs Every Few Minutes
This typically happens with older master templates applied to newer PowerPoint versions. The template contains formatting objects that PowerPoint’s co-authoring engine doesn’t fully support, triggering phantom conflicts even when collaborators are on different slides. The fix is to create a new clean version of the master template in the current PowerPoint version and apply it to a fresh copy of the file.
Problem: File Opens as Read-Only
A few causes: the file might be checked out in SharePoint (someone hit the Check Out option instead of just opening). It could be in a format that doesn’t support co-authoring (.ppt instead of .pptx). It might have IRM restrictions applied. Or someone might have saved a local copy in a protected location. Check format, check SharePoint checkout status, and check file properties.
Problem: Layout or Fonts Look Different on Different Machines
This is a local font issue. If your presentation uses fonts that aren’t installed on all collaborators’ machines, PowerPoint substitutes a fallback font, which can change text flow and layout significantly.
Fix it by:
- Sticking to cloud fonts or fonts that come standard with Microsoft 365
- Embedding fonts in the file before sharing (File → Options → Save → check Embed fonts in the file)
General Rule for Cleaner Co-Authoring
Keep everyone on the same version of PowerPoint. Mixed environments—some people on PowerPoint 2019, some on Microsoft 365, some using the web app—are a consistent source of feature gaps and unexpected behavior. For critical collaboration projects, aligning the team on Microsoft 365 desktop eliminates most cross-version friction.
If your team is working with older Office versions, our article on why Office 2016 is still a solid choice helps evaluate whether upgrading makes sense for your collaboration needs.
For Mac users collaborating with Windows-based teams, understanding cross-platform compatibility matters. Our guide on why Microsoft Office for Mac works well on Apple computers covers the key considerations.
Quick Reference: PowerPoint Collaboration Checklist
| Checklist Item | Status Check |
|---|---|
| File saved to OneDrive or SharePoint (not local) | File → Save As → Cloud location |
| File format is .pptx (not .ppt) | Check title bar file extension |
| AutoSave is turned On | Top-left toggle in PowerPoint window |
| Slide Master set before team edits begin | View → Slide Master |
| Sections assigned by team member or topic | Right-click thumbnail panel → Add Section |
| Permissions set correctly (edit vs. view) | Share → Can edit / Can view |
| Baseline version saved before major edits | File → Info → Version History → Save a copy |
| All collaborators on Microsoft 365 desktop app | File → Account → Product Information |
| Comments used for feedback during review phase | Review → New Comment |
| Final delivery format confirmed | Decided and communicated to all stakeholders |
| Loop settings configured (if applicable) | Slide Show → Set Up Slide Show |
Getting the Right Microsoft Office Version for Collaboration
PowerPoint’s collaboration features require Microsoft 365 or Office 2024 for the full experience. Earlier versions support basic co-authoring but lack Copilot integration, Task assignments, and some of the newer conflict resolution improvements.
If you’re evaluating which Microsoft software fits your team’s needs, browse our complete software collection for genuine Microsoft Office licenses. For guidance on choosing the right edition, our Microsoft Office for Windows 7 guide covers compatibility for teams running older systems.
At Indigo Software Company, we provide 100% genuine Microsoft licenses that give your team full access to every collaboration feature covered in this guide.
Collaborating on PowerPoint presentations in 2026 is genuinely better than it was two or three years ago. The co-authoring engine is more stable, the version history tools are more accessible, and the integration with Teams and SharePoint has matured into something that actually works for real workflows rather than just demos.
But none of those improvements matter if the file is saved in the wrong place, AutoSave is off, or your team is jumping into each other’s slides without a clear division of ownership. The technology works when the setup is right. The setup starts with three things: cloud storage, .pptx format, and AutoSave on.
Once those are in place, the best investment you can make is process, not features—agreeing on who owns which slides, how feedback gets communicated, and what a final version looks like. Teams that co-author well tend to have clear conventions, not just good software.
Set up the file right, give your team clear lanes, and use Version History as your safety net. That combination will get you to a finished, polished presentation faster than any workaround for version chaos ever could.
Frequently Asked Questions
How do I set up PowerPoint for real-time co-authoring?
Save your file to OneDrive or SharePoint in .pptx format, turn on AutoSave, and share the file with collaborators using the Share button. All three conditions must be met—cloud storage, correct format, and AutoSave enabled—for real-time editing to work.
Can multiple people edit a PowerPoint presentation at the same time?
Yes. When the file is stored in OneDrive or SharePoint with AutoSave enabled, multiple users can edit different slides or objects simultaneously. You’ll see colored indicators showing where each collaborator is working.
What happens when two people edit the same slide?
If they’re editing different objects (different text boxes, images, or shapes), changes merge automatically. If they edit the exact same text box simultaneously, PowerPoint presents a conflict dialog letting you choose which version to keep.
How do I prevent version chaos in team presentations?
Use Sections to assign slide ownership, keep the file in one cloud location (avoid emailing copies), name version checkpoints before major edits, and use Comments for feedback rather than making direct edits to someone else’s slides.
What are the most important features of PowerPoint for team collaboration?
The key collaboration features include real-time co-authoring, version history, Comments and Tasks, Sections for organizing slide ownership, Slide Master for visual consistency, and sharing permissions that control who can edit versus view.
How do I loop a PowerPoint presentation after the team finishes building it?
Go to Slide Show → Set Up Slide Show and check the box for looping. Our complete tutorial on how to loop a slideshow in PowerPoint covers automatic timing, transition settings, and kiosk mode configuration.
Is SharePoint or OneDrive better for team presentations?
SharePoint is better for team collaboration because files belong to the group rather than one person, permissions persist when team members change, and integration with Teams channels is native. OneDrive works well for personal presentations shared temporarily.
How does Copilot help with PowerPoint collaboration in 2026?
Copilot’s Agent Mode handles multi-step editing tasks across slides, integration with SharePoint Organization Asset Libraries maintains brand consistency, and view-only Copilot access lets reviewers query presentation content without edit permissions.
What PowerPoint version do I need for full collaboration features?
Microsoft 365 provides the complete collaboration experience including Copilot, Tasks, and advanced co-authoring. Office 2024 supports core co-authoring. Office 2019 and earlier versions offer limited collaboration capabilities and miss newer features.
Can I collaborate on PowerPoint with external users?
Yes. Generate a shareable link with appropriate permissions (view or edit). External users can open the presentation in PowerPoint for the web without needing a Microsoft account for view-only access. Edit access requires a Microsoft account.

