As a follow-up to my earlier post about Exchange Server login problems, here's a full list of what Microsoft Exchange Server 2000 expects for the login usernames for different protocols. Bon appetit!

• POP3: domainname\ntusername\exchangealias
• IMAP4: domainname\\ntusername\\exchangealias
• SMTP: ntusername

Some of those terms are not completely intuitive, so here's a quick explanation:

domainname

The "domainname" is the name of the domain your account logs into, e.g. "ourco". It is not the fully qualified domain name, just the shortened version.

ntusername

The is the name that you type in to log into the network. In the Active Directory Users and Computers control panel you can find it on the Account tab listed as "User logon name".

exchangealias

This is the alias that Exchange Server creates for your account. Who knows why it doesn't just use the default based on your login, but anyway. You can find this in the Active Directory Users and Computers control panel on the Exchange General tab as the Alias field.

One other quick note is that, even if the login string might have a space in it you shouldn't need to use quotation marks around it, just the basic string should be enough - any software you use should be smart enough about how it handles logins. Also note that I've only tested this on Exchange Server 2000, not Exchange 5.5 or the newer Exchange Server 2003, but they should work the same.

After pulling my hair out over that on many an occasion, I hope it can help others.