User Name Length Limits in Active Directory

I was asked today by one of my readers what the character limits are of user names in Active Directory

Found a link to the answer in Microsoft's KB. Click here to go to it.

But the quick answer is 64 characters for display names and 104 characters for user logon names, however Microsoft recommends that user logon names be kept to 64 characters as well.

Oh, and the Pre-2000 logon name is limited to 20 characters.