Owners are being removed when they update their SDLs Known Issue - Owners are being removed when they update their Static Distribution Lists (SDL), due to the "Add myself as owner" box defaulting to an un-checked state.
Removing Owners from Shared Mailboxes also removes membership Known Issue - Removing owners from a shared mailbox also removes their entry from the members access list too.
Dropping SM owners from membership removes corresponding send as row from DB Error by dropping SM owners from membership removes corresponding send as row from DB
