Unlike Owner Teams, Group (AAD) Teams can't currently have a Default Queue. Because of this you effectively can't use them to control Queue membership.

Allow Group/AAD Teams to have a Default Queue just like Owner Teams. The (private) Default Queue should have a list of members automatically maintained from the Team's members (just like with an Owner Team's Default Queue) but also synced from the appropriate AAD group.

This would considerably reduce the burden of administering queue membership.

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Simon