Search AD for email aliases

There's no gui tool to easily find an email aliases in Active Directory

Found this and it works!

Right Click

1. Open AD and right click 'find' on the domain
2. Custom Search
3. Advanced tab and choose LDAP Query
4. Add the following line to the field: proxyaddresses=smtp:username@domainname.com
5. you can you use wildcards which is helpful - especially if you host multiple domains (something*@*.com) will yield results :)