Some times we need to have the full distinguished LDAP name for an Active directory user.

There are at least two ways to accomplish this goal:

1st) Running the command: dsquery user -name ADUSERNAME

where ADUSERNAME is the name of the user on the AD

2nd) Running the command: ldifde -f users.txt

where all LDAP data from AD is dumped into the file named users.txt

Source: http://primalcortex.wordpress.com/2008/07/14/how-to-get-the-ad-ldap-dn-name-from-an-user/