You may have read my other post on using the SID/GUID alternate formats for DNs for queries and my post last year on using alternate DN formats for binding and searching as well… Here is something else I recently learned that I thought was interesting.
There are actually more alternate DN formats…
All of these formats can be used for the bind string…
Dmitri posted them to AD Org as such
ACTIVE DIRECTORY FORMATS
So yes… You can even use displayname as the bind DN string but man I would recommend being careful there because there is NOTHING implementing uniqueness and obviously if AD can’t uniquely identify the bind DN it won’t let you authenticate with it.