An employee recently came back and since we still had her account as a tombstone, I undeleted it. She was having trouble getting into her mailbox, which is understandable - I think the account was deleted right at the time when we were undergoing an Exchange migration. So I removed the mailbox and then created a new mailbox for the account, and restored all the items in it. Works fine - EXCEPT that I am getting autoresponses with the following error:
#550 4.4.7 QUEUE.Expired; message expired ##
Keep in mind, over 1000 other employees have sound email traffic so I think this is account or mailbox-related. I just don't find a good correlation between the error and the behavior online. As a weird sidenote, I tried to grant full control to the mailbox via the ECP and got a hung screen. I can apply the permissions via Powershell using Add-MailboxPermission. From that I'm betting this is probably a URL setting issue or something in IIS, but where would you suggest I begin looking?
Thanks for your time
I have seen this error happens with users who get new email as they get new GUID but in autocomplete that gets stored somewhere and the way to resolve it is to either delete the autocomplete for this user or simply create the X500 attribute in his account object.