Register Service Principal Names (SPN) for SIP server
How to register SPN for the SIP server on Windows Server 2008.A service principal name (SPN) is the name by which a client uniquely identifies an instance of a service. Before the Kerberos authentication service can use an SPN to authenticate a service, the SPN must be registered on the account object that the service instance uses to log on.
To register SPN, do the following:
1. Create user: officesipserver
2. Run in command line: setspn -S sip/[YOUR SIP DOMAIN NAME HERE] officesipserver
3. Configure delegation
4. Add officesipserver to Administrator's group
5. Configure the OfficeSIP service to Log On as officesipserver user
6. Restart OfficeSIP service