Windows 2003 Server Impersonation Levels

[SRobb]

Has anybode had problems with impersonation levels in Windows 2003 Server? My main AD domain controller which is also my Exchange 2003 server has developed a problem. OWA suddenly stopped working but I have checked all permissions and settings in AD, IIS and Exchange and they are all OK. If I select the Dial-in tab in AD Users & Computers I get the error 'Could not load the Dial-in profile for this user: Either a required impersonation level was not provided, or the provided impersonation level is invalid.' I also get the same error if I load the WINS manager. I have set the machine-wide impersonation level to all available options using Component Services but this changes nothing. Google and the Microsoft site have not helped me much, can anybody shed any light on this?

[Dappycow]

http://www.just2good.co.uk/ will have or find the answer for sure. Check out their forum