Windows 10 version 1909 update causing issues for Microsoft Teams, OneDrive for Business, and Outlook

Some of Microsoft’s most popular services are running into issues while running on Windows 10 version 1909.

When you purchase through links on our site, we may earn an affiliate commission.Here’s how it works.

What you need to know

What you need to know

Microsoft Teams, Outlook, and OneDrive for Business run into issues following the latest update to Windows 10 version 1909. TheKB5003169 cumulative update, which rolled out last week, appears to be the cause of the problems. The issues only appear for a small percentage of users, according to Microsoft.

Those that are affected by the issue will see a message that states, “We ran into a problem. Reconnecting…” or something similar. The message also has a button to restart the app. The error code for the message is 800800300.

Microsoft sent out a message through Microsoft 365 advisory regarding the issue (viaBleeping Computer):

We’ve received reports that some users on Windows Update KB 5003169 are unable to connect to various Microsoft 365 desktop clients including Microsoft Teams, Outlook, and OneDrive for Business. Our investigation has determined that a code issue exposed by a recently deployed Windows update, detailed in KB 5003169, is causing the problem.

The temporary fix for the issue is to restart your PC. Alternatively, Microsoft suggests that you use the web versions of Teams, OneDrive for Business, and Outlook while it investigates the issue. Using a web version of a service won’t deliver the same experience, but it will allow people to access the popular Microsoft services until a more permanent solution is found.

Windows 10 version 1909 is now officially out of support for standard users, though it’s probably safe to assume that Microsoft will find a way to have its most popular services work on it.

Get the Windows Central Newsletter

Get the Windows Central Newsletter

All the latest news, reviews, and guides for Windows and Xbox diehards.

Sean Endicott is a tech journalist at Windows Central, specializing in Windows, Microsoft software, AI, and PCs. He’s covered major launches, from Windows 10 and 11 to the rise of AI tools like ChatGPT. Sean’s journey began with the Lumia 740, leading to strong ties with app developers. Outside writing, he coaches American football, utilizing Microsoft services to manage his team. He studied broadcast journalism at Nottingham Trent University and is active on X @SeanEndicott_ and Threads @sean_endicott_.