Windows 2008 DCOM problem

Question

Hi,

I have an DCOM server and when a process calls a method that changes the password of an user the next petition fails.

This problem only occurs when the machine is a Windows 2008 working as Domain Controller. Anyone knows how to fix it?

Thanks

EDIT: There is an audit security error with the code 4625, I have been searching in google and there is a bug in MS Exchange 2007 with Windows Server 2008 that has the same behaviour, but was solved with a Hotfix of Exchange.