The Office 365 logo will be replaced throughout Outlook Mobile for Android with the Microsoft 365 logo, as will references to the account type.
[When this will happen:]
Standard Release: We will begin rolling out early November and expect to complete by mid-November 2023.
[How this will affect your organization:]
When this update rolls out, users may see their account represented with the updated icon in their accounts list.
[What you need to do to prepare:]
You may want to notify your users about this change and update any training documentation as appropriate.