Errors when adding a user Full mailbox permissions to another mailbox

[JimmyRosa]

Hi all,


I'm receiving this error when adding a user to shared mailbox: "Some Controls Aren't Valid. Changes to the user/group list are required to grant or revoke permissions"

Although I receive the error the user can still see the mailbox but only 2 of the 4 folders within it?


When I add myself or a test user it goes though fine and you're able to see all the folders.


Any advice would be great, thanks,
JR

 

[JimmyRosa]

Update:
I removed said user from the mailbox and re-added, this time with no erros present but user can still only see 1 of the 4 folders under this mailbox!?!


Kind regards,
J

 

[Zelandakh]

Can they see them all using OWA? If so, check the application event log on the CAS and look for matching 9646 events in which case you're hitting a bottleneck on the CAS.