Allow Adding Dynamic Security groups to shared mailboxes

[Conner_Winn]

Please allow dynamic security groups to be added to shared mailboxes. Currently the only way to do this is with MESGs, but these are not dynamic. 

[#2]

Dynamic Security Groups are not valid Exchange recipients (they need to have an email address to be considered such), and generally speaking are only used for Azure AD-related functionalities, not Exchange. Dynamic DGs on the other hand aren't security principals, so cannot be used to delegate specific permission types across all of Exchange. Microsoft 365 Groups with dynamic membership were supposed to be the middle ground here, but it's sure taking a lot of time for them to be supported across all the different workloads...

[#3]

Yes please enable some type of Dynamic control for assigning delegated permissions to shared mailboxes.....this is incredibly inconvenient