Microsoft KB Archive/937311

= Error message when you run the Prep Schema step on the locked-down Active Directory service for the installation of Communications Server 2007: &quot;Either a required impersonation level was not provided, or the provided impersonation level is invalid&quot; =

Article ID: 937311

Article Last Modified on 8/15/2007

-

APPLIES TO


 * Microsoft Office Communications Server 2007 Enterprise Edition
 * Microsoft Office Communications Server 2007 Standard Edition

-



SYMPTOMS
When you run the Prep Schema step on the locked-down Active Directory directory service for the installation of Microsoft Office Communications Server 2007, you receive the following error message:

0x80070542: Either a required impersonation level was not provided, or the provided impersonation level is invalid



CAUSE
This issue occurs because the Communications Server 2007 deployment tools do not have the impersonation level that is required to access the following registry key value on the locked-down Active Directory service:



RESOLUTION
To resolve this issue, run the Prep Schema step on a domain controller that has the Schema Operations Master role.

To determine which domain controller has the Schema Operations Master role, follow these steps:
 * 1) Click Start, click Run, type mmc, and then click OK.
 * 2) On the File menu, click Add/Remove Snap-in.
 * 3) In the Add/Remove Snap-in dialog box, click Add on the Standalone tab.
 * 4) Double-click Active Directory Schema, click Close, and then click OK.
 * 5) Right-click Active Directory Schema in the upper-left pane, and then click Operations Masters to view the server that has the Schema Operations Master role.

Note The Active Directory Schema snap-in is available only after you register the Schmmgmt.dll file. To register the Schmmgmt.dll file, click Start, click Run, type regsvr32 schmmgmt.dll, and then click OK. A message may appear that states that the registration is successful.



MORE INFORMATION
Keywords: kbtshoot kbexpertiseinter kbprb KB937311

-

[mailto:TECHNET@MICROSOFT.COM Send feedback to Microsoft]

© Microsoft Corporation. All rights reserved.