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it's the File Replication Service
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HareI66: Thank you. I looked for this service, but it wasn't listed in my services.msc snap-in on the Windows 2008 R2 DC. Might it be named something else? Again, AD seems to be replicating fine to the other DC in the domain, but I consistently get this access denied error when running dcdiag. 
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HareI66: Thank you. I looked for this service, but it wasn't listed in my services.msc snap-in on the Windows 2008 R2 DC. Might it be named something else? Again, AD seems to be replicating fine to the other DC in the domain, but I consistently get this access denied error when running dcdiag.

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could you pls provide eventviewer details with any specific error code?
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could you pls provide eventviewer details with any specific error code?

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Active Directory appears to be running and replicating fine to other DCs on our Windows Server 2008 R2 machine, yet when I run dcdiag on that machine (which is being run from an elevated, 'run as administrator' command prompt), I get the following error:<br />
<br />
Starting test: Services &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; <br />
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Could not open NtFrs Service on NAMEOFDC, error 0x5 &quot;Access is denied.&quot; &nbsp; <br />
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Every other test passes fine. I checked to see if there's a services in services.msc for this service (NtFrs), but I can't find one.<br />
<br />
Does anyone know what might be causing this?
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Active Directory appears to be running and replicating fine to other DCs on our Windows Server 2008 R2 machine, yet when I run dcdiag on that machine (which is being run from an elevated, 'run as administrator' command prompt), I get the following error:

Starting test: Services                                                               

Could not open NtFrs Service on NAMEOFDC, error 0x5 "Access is denied."   

Every other test passes fine. I checked to see if there's a services in services.msc for this service (NtFrs), but I can't find one.

Does anyone know what might be causing this?

&quot;Access Denied&quot; error when running dcdiag on Windows 2008 R2 server for NtFrs Service Test.

Windows Server 2008 and Windows Server 2008 R2, based on the Microsoft Vista codebase, is the last 32-bit server operating system released by Microsoft. It has a number of versions, including including Foundation, Standard, Enterprise, Datacenter, Web, HPC Server, Itanium and Storage; new features included server core installation and Hyper-V.

Windows Server 2008

Active Directory (AD) is a Microsoft brand for identity-related capabilities. In the on-premises world, Windows Server AD provides a set of identity capabilities and services, and is hugely popular (88% of Fortune 1000 and 95% of enterprises use AD). This topic includes all things Active Directory including DNS, Group Policy, DFS, troubleshooting, ADFS, and all other topics under the Microsoft AD and identity umbrella.

Active Directory

The Microsoft Server topic includes all of the legacy versions of the operating system, including the Windows NT 3.1, NT 3.5, NT 4.0 and Windows 2000 and Windows Home Server versions.

&quot;Access Denied&quot; error when running dcdiag on Windows 2008 R2 server for NtFrs Service Test.

"Access Denied" error when running dcdiag on Windows 2008 R2 server for NtFrs Service Test.