What happened to Microsoft 365 app?
In short
Renamed on .
Microsoft began rolling out the Microsoft 365 Copilot app name and icon on , and changed the web address to m365.cloud.microsoft.
Source: Microsoft Support.
What this means
On , Microsoft began rolling out a new name and icon for the Microsoft 365 app across web, iOS, Android, and Windows. Existing users with work, school, or personal accounts see the change in their apps, and the office.com and microsoft365.com addresses redirected automatically. In regions without Copilot, the Copilot tab is removed from the Home screen, but the new name and icon stay the same.