On my Exchange 2007 server, I have granted Full Access to all the mailboxes. From my Outlook and OWA I am able to open all the mailboxes except for 2. For those 2 mailboxes I get a message indicating I don't have permissions. How can this be since in the Exchange GUI console and powershell I have verified Full Access permissions for my account over the 2 problem mailboxes.

Try removing yourself from the 2 problem mailboxes and allow AD to replicate with Exchange and then add yourself back into the mailbox as full permission.

Try removing yourself from the 2 problem mailboxes and allow AD to replicate with Exchange and then add yourself back into the mailbox as full permission. Hi shawnmLSC, Have you tried the steps above? Does the issue persist?Please remember to click Mark as Answer on the post that helps you, and to click Unmark as Answer if a marked post does not actually answer your question. This can be beneficial to other community members reading the thread. Thanks

Sorry for the slow response. I didn't get notified when you replied to my post. I just logged in to view my post and then saw your reply. Yes, I did trying removing myself and the domain admin account from the 2 problem mailboxes. I waited 24 hours and then readded Full Access for me and the Domain admin account to the 2 problem mailboxes. I got the same result, I still can't open these 2 mailboxes.

Can you log on as those 2 mailboxes? If yes, can you try to delegate mailbox access to you from those 2 mailboxes and see if that work.

You may want to use PFDAVADMIN to check if the perms are okay and do not contain any invalid entries like invalid SIDs etc. They can also be re-added using the same tool or via PowerShell - Add-MailboxPermission testmbx -AccessRights FullAccess -user testuserMCITP: EMA 2007/2010 | MCSA | Blog http://ehlo.me