Security News > 2021 > May > Recent Windows 10 update blocks Microsoft Teams, Outlook logins
A recent Windows 10 1909 cumulative update prevents Microsoft 365 desktop users from logging into Microsoft Teams, Microsoft Outlook, and Microsoft OneDrive for Business.
This issue is caused by the Windows 10 1909 KB5003169 cumulative update released last week as part of the May 2021 Patch Tuesday updates.
To fix this issue, Microsoft states that you need to restart Windows 10 again after the update finishes installing.
"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," Microsoft explains in a recent Microsoft 365 advisory.
Microsoft states that their telemetry indicates that only a small percentage of users are affected by this bug until they restart Windows 10.
If reboot Windows 10 does not resolve the issue, Microsoft recommends that you use the web versions of the Microsoft Teams, OneDrive for Business, and Outlook applications while they investigate the problem.
News URL
Related news
- Microsoft says it broke some Windows 10 patching – as it fixes flaws under attack (source)
- Users call on Microsoft to update Outlook's friendly name feature (source)
- Microsoft: Windows 11 22H2 reaches end of support in 60 days (source)
- Microsoft shares Outlook workaround for Gmail sign-in issues (source)
- Microsoft is killing the Windows Paint 3D app after 8 years (source)
- Windows 10 KB5041580 update released with 14 fixes, security updates (source)
- Windows Server August updates fix Microsoft 365 Defender issue (source)
- Microsoft retires Windows updates causing 0x80070643 errors (source)
- Microsoft shares temp fix for Outlook, Word crashes when typing (source)
- Microsoft removes FAT32 partition size limit in Windows 11 (source)