Today I was setting up a new email address for a user and I got the following error:
E-mail already exists in this organization
Apparently the address alreaty existed… how do I find it?
- Start Active Directory Users and Computers
- Goto Find…
- Select Custom Search
- Select the advanded tab
- put “proxyaddresses=smtp:mail.address@domain.com” into the editbox (drop the “s)
- Make sure the “Entire directory” scope is selected
Source
http://groups.google.com/group/microsoft.public.exchange.admin/browse_thread/thread/21888e98bb4e5ea9