Updated January 15, 2026: We are canceling a proposed change related to renaming the existing Calling and Meetings executable.

No action is required from administrators. This change did not introduce a new binary. It involved renaming the existing executable used for Calling and Meetings as a workaround for a Windows compatibility issue. 

What Happened? 

To reduce administrative effort, we partnered with the Windows team to deliver the fix for a Windows compatibility issue. With the Windows fix now fully rolled out in Windows 24H2 and 25H2, the executable name change is no longer required and has been rolled back. 

Was this a security, reliability, or compliance issue? 

• This was not a security or compliance issue. 
• It was a platform compatibility issue in Windows. 
• No customer data, identity, or tenant configuration was at risk. 

Was my tenant impacted? 

Only organizations participating in our Technology Adoption Program (TAP) were affected. Specifically, the change applied only to the TAP Admin earlyadopter subset (Ring 1.5). 

If your organization does not participate in the Microsoft Technology Adoption Program, you were not impacted in any way. The change has been fully rolled back for TAP participants, with no lasting configuration or behavioral changes on client machines. No administrator action is required. 

What if we haven’t deployed recent Windows updates yet? 

We understand that many enterprises deploy Windows cumulative updates on managed timelines. 

• There is no risk or degradation if the referenced Windows KBs are not installed. 
• New features that depend on these Windows updates will explicitly check for the presence of the required KBs and will only enable when they are available. 
• If the KBs are not installed, those features simply remain disabled―no functionality breaks and no admin action is required. 

Windows updates that include the fix 

The Windows compatibility fix is included in Windows updates for versions 24H2 and 25H2, delivered through KB5068861. 

What to expect next? 

• No changes to admin configuration or tenant settings 
• No service disruption