Microsoft Highlights Copilot Compatibility Issues Across Office Apps

Microsoft just admitted something that many users have probably been experiencing quietly for weeks now. The company has confirmed that its Copilot AI assistant runs into problems when you have multiple Office applications open at the same time. This is the kind of bug that sounds minor on paper but can be incredibly frustrating when you’re trying to get work done.

According to a support document published by Microsoft recently, the issue happens when you’re running more than one Office app simultaneously on the same computer. If you’re the type of person who keeps Word, Excel, and PowerPoint all open at once while working on a project, you’ve probably run into this problem without even realizing what was causing it. The Copilot pane either won’t open properly or just refuses to work the way it should.

The technical explanation is that one Office application, let’s say Excel, starts something called a WebView2 instance first. When you then try to open Copilot in another app like Word, it attempts to start a second instance but runs into a conflict. The first app basically blocks the second one from working properly. Interestingly, if you close the first application, the Copilot pane in the second one will suddenly work just fine. It’s one of those bugs that makes you wonder how it wasn’t caught during testing.

This comes at a particularly awkward time for Microsoft. The company has been pushing Copilot hard as the future of productivity, spending billions of dollars to integrate AI across all their products. They’ve been telling businesses and individual users that this AI assistant will revolutionize how we work, making everything faster and more efficient. But if the basic functionality breaks down when you’re using multiple Office apps, which is exactly how most people actually work, that’s a serious problem.

The timing is even more complicated because Microsoft recently announced they’re automatically installing the Copilot app on Windows devices that have Microsoft 365 desktop apps. This rollout started in October and there’s no way for personal users to opt out. So essentially, Microsoft is forcing users to have this app on their computers, but it doesn’t work properly in one of the most common work scenarios. That’s not exactly the smooth user experience the company has been promising.

There’s also the bigger picture of Copilot’s overall performance in the market. Reports suggest that adoption rates have been surprisingly low, with some estimates putting it at around two percent of eligible users after nearly two years. That’s honestly terrible for a product that Microsoft has positioned as essential to the future of work. When you combine low adoption with bugs like this one, it starts to paint a picture of a product that was maybe rushed to market before it was truly ready.

For people who paid for Copilot access, either through a standalone subscription or as part of Microsoft 365 Premium, this bug is particularly annoying. They’re paying extra money for a feature that’s supposed to make their work easier, but instead they’re dealing with technical issues that interrupt their workflow. Nothing kills enthusiasm for new technology faster than having to troubleshoot it constantly.

Microsoft has acknowledged the issue, which is at least better than staying silent about it. The company is investigating the bug, but there’s no word yet on when a fix will be available. In the meantime, the workaround is simple but inconvenient, you basically have to close one Office app before you can use Copilot in another one. That defeats the entire purpose of having an AI assistant that’s supposed to help you work more efficiently across different tasks.

What makes this situation more frustrating is that it highlights a fundamental problem with how Microsoft has been rolling out Copilot. The company seems to be prioritizing speed over stability, pushing the feature to as many users as possible without ensuring it works smoothly in real-world conditions. Most people who use Office for work don’t just use one app at a time. They switch between Word documents, Excel spreadsheets, PowerPoint presentations, and Outlook emails constantly throughout the day. If Copilot can’t handle that basic workflow, then what’s the point?

There are also questions about what other issues might be lurking beneath the surface. If running multiple Office apps causes problems, what about other scenarios? What happens when you’re using Copilot while also running browser extensions, VPN software, or other productivity tools? Microsoft hasn’t said whether this is an isolated bug or part of a larger compatibility issue.

The company has troubleshooters available for various Copilot problems, which suggests they’re aware that users are experiencing multiple types of issues. There’s even a specific troubleshooter for people who have a Copilot license but can’t see the Copilot icon in their Office applications. That’s another problem that shouldn’t exist if the product was properly tested before launch.

Microsoft has built its entire recent strategy around AI and Copilot specifically. The company has integrated it into Windows, Office, Edge, and basically every product they make. But if the foundation isn’t solid, if the core experience is buggy and unreliable, then all that investment and marketing doesn’t matter. Users will simply stop trying to use it, or worse, they’ll actively avoid it and look for alternatives.

If there is one, it appears to be a fixable problem. It’s a bug, not a fundamental design flaw. Microsoft has the resources and expertise to solve this issue if they prioritize it. The question is whether they’ll move quickly enough to prevent more damage to Copilot’s already struggling reputation. For now though, users are left working around a problem that shouldn’t exist in the first place.