Worst time Windows 10 connectivity bug in Outlook, Teams and Office 365

Worst time Windows 10 connectivity bug in Outlook, Teams and Office 365
Bugs affecting remote workers in Microsoft services couldn’t get any worse.
What you need to know
Windows 10 bugs prevent Office 365, Microsoft Teams, Outlook, and other apps from connecting to the Internet.


This bug affects people using proxy connections or VPNs.
This bug occurs when millions of people work at home for the first time.
Microsoft has warned of a Windows 10 bug that prevents Office 365, Microsoft Teams, Outlook and other apps from connecting to the internet. This bug affects people using proxy connections and VPNs. Bugs come at a terrible time, as millions of people are working for the first time at home due to current health restrictions. This bug can also affect people’s ability to connect to the Internet.


This bug affects all Windows versions that have had cumulative update KB4535996 applied, or three cumulative updates since. KB4535996 was released on February 27, 2020, so devices updated after that date may experience bugs.


Microsoft briefly describes the bug in the documentation.
Devices using a proxy may have limited or no Internet connection status
Devices that use manual or auto-configuration proxies, especially virtual private networks (VPNs), may or may not have a limited Internet connection status in the Network Connectivity Status Indicator (NCSI) in the notification area. It can happen when you connect to or disconnect from a VPN, or after changing the status between the two. Devices with this problem may also have problems connecting to the internet using an application using WinHTTP or WinInet. Examples of applications that may affect devices in this state are as follows, but are not limited to Microsoft Teams, Microsoft Office, Office365, Outlook, Internet Explorer 11 and some versions of Microsoft Edge.


Microsoft says restarting the device may alleviate the problem. I’m also looking for a solution to fix this by early April and targeting a Microsoft catalog-only release of out-of-band updates.

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