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How to synchronize group members via Office 365 Groups across Office 365 Tools?
Hello, As almost all office 365 collaboration tools are backed by Office 365 Group, I assumed whenever a member is added into Office 365 Group, It would be automatically added in other Office 365...
You are not doing anything wrong, but your expectations are high 🙂 Give it some time, it needs to synchronize the changes between all the workloads. As discussed in numerous other threads here, Groups are "loosely coupled" and updates are handled in a different manner. By default, a synchronous "notification" will be sent to all workloads, however this process is known to fail, and when it does you have to wait for the asynchronous background job to pick up the changes. Which might take a while.
It will sync but takes time, for your case would suggest dynamic group:
Create or edit a dynamic group and get status - Azure AD - Microsoft Entra | Microsoft Learn