We have two offices & two forests with a trust
Office A with two domain controllers one Windows Server 2003 and Windows Server 2008r2.
Office B there are two domain controllers both Windows 2003 server.
From office B trying to change permissions on a folder adding a user from office A getting the following error message "The system has detected a possible attempt to compromise security" but works fine from office A to office B, Any Ideas?
The offices are linked by a VPN and rules have been checked.
I have validated the trusts from both sides with no problems.
I have checked the time on all domain controllers all in tollerance.
Thanks
Matt