Exchange

Overview: Use the following instructions if you need to assign a mailbox to a different AD account. Assure that you have Deleted Item Retention configured before performing the following actions.

1. Open the EXCHANGE SYSTEM MANAGER.
2. Right-click the mailbox store and scroll to PROPERTIES.
3. Click on the LIMITS tab.
4. Under the DELETION SETTINGS, assure that the KEEP DELETED ITEMS FOR field is assigned a value greater than 0. The default should be more than 0.
5. Close this dialog and open ACTIVE DIRECTORY USERS AND COMPUTERS.
6. Right-Click on the user's account and scroll to EXCHANGE TASKS.
7. Select DELETE MAILBOX and click NEXT.
8. At the "Deleting a mailbox permanently deletes all messages it contains" notification, click NEXT. (Because mailbox retention is configured, no mail will be lost). Click FINISH.
9. Under the mailbox store, right-click on MAILBOXES and scroll to RUN CLEANUP AGENT.
9. Then wait for RECIPIENT UPDATE SERVICES to run or run RUS manually.
10. To run RUS, open the EXCHANGE SYSTEM MANAGER.
11. Expand RECIPIENTS | RECIPIENT UPDATE SERVICES.
12. Right-Click the appropriate domain's update service in the right pane.
13. Scroll to UPDATE NOW.
14. To re-attach the mailbox to the new account, go back to EXCHANGE SYSTEM MANAGER.
15. Right-click on the mailbox (there should be a red circle with a cross through it) and scroll to RECONNECT.
16. Specify the new account. After RUS has run again and the CLEANUP AGENT has been run, the mailbox will be connected. You can also tell this by the user's reappearance in the GLOBAL ADDRESS LIST.

Exchange - Changing the Mailbox Owner

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Richard G. White, 2007