I assigned a a user to the Discovery Management Role group and have given him full access permissions to the Discovery Search Mailbox. The search works and finds results. If I try to open it as another mailbox in OWA it states the mailbox cannot be found.Microsoft Outlook cannot access the specified folder location. If I try to open the mailbox by opening another mailbox within OWA, it does not resolve the mailbox name. I cannot open it as another mailbox in Outlook either.
I have verified in ADSIEDIT that the user's account is part of the Discovery Management group members as I have read that this can sometime happen where ADUC shows the membership but its not really there.
I've also created an entirely new Search results mailbox and have the same issue with it.
This is turning into a real problem as the company is behind on its compliance searches.