Searching by "User Logon Name"

Question

Hey guys
I am currently searching the AD by a user's Common Name. For example:
String searchFilter = "( & ( objectClass = user ) { CN = " + commonName + " } )";But if I want to search the AD by a "User Logon Name", what do I write in the search filter instead of "CN"? Is this piece of information even available?
If not, is there any other way for me to search the AD by a "User Logon Name"?
Thanks
Noam

Answer 1

Ordinarily I would suggest that you browse the Active Directory using a tool such as ldp.exe and it would become quite obvious which attributes are used to store the user logon names.
But because it's Monday, the birds are chirping and it's not raining, I'll make it kind of easy for you:
If you are logging with a NT style domain name like ANTIPODES\alberte, then you will want to search for soemthing like:String searchFilter = "( & ( objectClass = user ) (samAccountName = alberte) )";otherwise if you are using an e-mail style logon name then your search will look something like:String searchFilter = "( & ( objectClass = user ) ( userPrincipalName = [email protected] ) )";