For all support questions you can write to:

Google Groups

Visit this group

- OR -

Email: support@officesip.com

Tutorials

How to setup SIP server
How to configure DNS server for SIP server
How to configure Service Principal Names (SPN) on Windows Server 2008

How to configure Microsoft's Windows Messenger
How to configure CounterPath's X-Lite
How to configure Office SIP Alerter (very simple SIP IM)