How to Setup the Office Communicator 2007 Mobile Client (For Windows Mobile)
This software is actually free! The latest version as of November 2008 is available at this link:
After installing, open the software on your Windows Mobile device.
You will notice a new presence icon on the Today screen.Select Options and under the Account Tab enter the following:
Sign-in address: username@klz.org.uk
domain\username: klz\username
password: your password
Now select the Server tab and enter the following:
External server name: im.klz.org.uk:443
Internal server name: im.klz.org.uk:443
Connect using: TLS
Select OK and then Sign In!
This works with Windows Mobile 6 and above.