If you’re running Communicator 2007 in a domain environment you can enable
automatic login via the proper DNS SRV record.
Non-domain users need to configure via their registry the Communicator 2007’s
setting to enable saving their user credentials.
The setting are:
REG_DWORD = SavePassword
You can set it You can configure this policy under both HKEY_LOCAL_MACHINE
and HKEY_CURRENT_USER but the policy setting under HKEY_LOCAL_MACHINE
Not set = User choice (default).
0 = Users do not have the option to save password.
1 = Users have the option to save password