Find Exchange User Alias
- Open Active Directory Users and Computers
- Right click the domain
- Select Find
- In the search window select Custom Search from the “Find” drop down
- Go to the Advanced tab
- In the Enter LDAP query section enter:proxyAddresses=smtp:emailalias@domain.com
You will need to change emailalias@domain.com to the alias you are finding
- Press Find Now
That should return you with the User account that has that alias