I have configured and successfully running a LCS2007 environment in a single domain. We recently added a new domain to the forest. The AD schema appears to be there for the new domain. There is a live communications tab in Active Directory and i am able to enable SIP for the users in the domain. These users show up in the LCS console. However when I attempt to log in as the user on the new domain I get an error that the account is not found.
I decided to run a validation on the setup with the user account in question. I receive the following error
User **user in new domain** Domain **First Domain in Forest** Protocol Kerberos Server sip Targer Invalidated.
Basically it appears my setup is only configured to look for the user in the original domain. Does anyone know how I can add or prep the new domain in the same forest to work?