When you are working with Active Directory the following may be useful,

Import and export directory objects – CSVDE & LDIFDE
ex: from the command prompt try CSVDE -f C:\Exportfile.csv
more help is available in this KB article.

Another useful utility while working with Active directory and LDAP(Light Weight Directory Access Protocol) is ADSI Edit (adsiedit.msc). Nice link if you want to know in detail.

Also found this interesting link with attributes and its description for AD Users. see here. And check this script to list all User object attributes in active directory schema.