Is it possible to apply mailbox permissions for members of a group?

Copper Contributor

Hope you are all healthy!


We're migrating from onprem to 365 and are currently hybrid. We've taken the opportunity to clean up roles and permissions using the "person>user group>permissions group>resource" model.


For most things this is fine, but I'm scratching my head on how to set delegation permissions for a role rather than a person/mailbox.


For example, UserA is the Sales Manager and UserB is the Sales Manager's assistant. 

UserA>SalesManagers>SalesFullAccess>folders/sharepoint etc

UserB>SalesManagerAssistants>SalesManagersMailboxReadManage>all sales manager mailboxes


It's that last step I can't fathom. If UserC becomes a Sales Manager, they'd be added to the SalesManagers group but how would UserB get access to UserC's mailbox?


Is this a PowerApps thing? A PowerAutomate thing? A PowerShell thing?


Apologies if this should be in Exchange, but it feels more like a GROUPS question to me.

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