How can I resolve issues with emails being sent to the wrong recipient in Exchange?

1. Determine why the emails are being sent to the wrong recipient.
2. Check whether the recipient’s email address is stored as a contact in the directory.
3. Review and update the Outlook auto-complete cache.
4. Check the email rules on the device sending the message.
5. Clear the Exchange transport database.
6. Clear the Exchange cache and re-index the mailbox.