NTLM SSO removes Windows users on a PC, which is a member of a Windows
domain and who are logged into that domain, from the need to explicitly log
into eGW. They simply point IE to the eGW URL (eg. http://domain.com/egroupware/)
and start working. They can of cause explicitly log out and log in as an
other user.
For more information look at the README at
http://www.egroupware.org/viewvc/trunk/phpgwapi/ntml/README
2. different authentication for SyncML and/or GroupDAV
You can now use eg. an external auth provider for the login via the
WebGUI (eg. ADS) and the passwords stored in SQL for SyncML.