Hello,
As you are getting Access denied to Exchange mailbox after disabling the user account,
Which user account have you disabled?
Which is the backup exec service account?
Which account do you use to connect to the mailboxes?
Please elaborate the query to further troubleshoot this issue.
However you can refer the following steps to troubleshoo this issue.
If the above does not help perform the following to resolve the issue.
1. Create a new user account for eg) vrtsbkup and its mailbox
2. Assign Admin and Domain Admin rights
3. Assign it exchange full Admin rights from Exchange System Manager
4. Assign it local admin rights on Exchange Server
5. Send email to this account and check if the email is received
6. Go to network>logon accounts, create a logon account for vrtsbkup
7. Right click on mailboxes and select connect as and type in the user name vrtsbkup and its password
Please update us on this issue.
NOTE : If we do not receive your reply within two business days, this post would be marked assumed answered and would be moved to answered questions pool.
