We recently migrated from Exchange 2010 to Exchange 2013. We are at CU8.
I am noticing since the upgrade that not all of the Distribution groups listed in AD, nor any of the new users created recently in AD and then set up with a mailbox via the New / Existing User are being displayed in EAC under Recipients / Mailboxes.
If I do a search for their name in EAC, it returns the proper result and the account is there. I can bring it up and edit settings, etc. Same for the Universal Distribution groups. But if I simply scroll down the list of either the mailboxes or groups in alphabetical order, they are not shown.
Does anyone have any idea what might be happening here? Thanks.