GetDomainUsersString()
From Rackspace Email & Apps API
This function will return a list of domain users and their active/inactive status.
Input Parameters
Three strings, and one return string:
Administrative username, Administrative password, Domain name,
User info string (as in: user1, 1 [crlf] user2, 0 [crlf]...) 1=active, 0=inactive
Return Values
If successful, the return value of the function will be 1.
Consult the Result Code Table for a list of result codes and their meaning.