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RPC error adding domain users to local admin group


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#1 AltGEKE

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Posted 23 April 2012 - 12:53 PM

DC: Win Server 2003
Laptops: Win7 Pro

When joining a set of laptops to the domain it prompts for domain admin credentials and appears to be successful, but gives an error of 'Changing the Primary Domain DNS name of this computer to " " failed. The name will remain domain.local
The error was:

The RPC Server is unavailable.

When attempting to add Domain Users to the local administrators group:
Windows cannot process the object with the name "domain users" because of the following error:
The RPC server is unavailable.


This happens even when wired on the network. I have tried uncommenting the localhost line in HOSTS, and manually adding the DNS server (which is also the DC).

Any suggestions would be very helpful.

Edited by AltGEKE, 23 April 2012 - 01:08 PM.


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#2 Baltboy

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Posted 23 April 2012 - 01:01 PM

Have you checked the RPC service on the server? Manually stop and restart it as well.
Get your facts first, then you can distort them as you please.
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#3 AltGEKE

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Posted 24 April 2012 - 01:41 PM

Have you checked the RPC service on the server? Manually stop and restart it as well.


Done so, and done so. Also checked that service on the end-devices themselves to no avail.
Wondering if a firewall is blocking the RPC communication. Pushing to test that.

#4 Baltboy

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Posted 25 April 2012 - 02:24 PM

I would definitely check into the firewall. RPC is port 135. However there are other services like WMI that if blocked can cause the same error. If possible I would try to disable the firewalls when attempting to join the computer to the domain.

Also for reference here is an extensive troubleshooting article - The RPC server is unavailable
Get your facts first, then you can distort them as you please.
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#5 AltGEKE

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Posted 25 April 2012 - 07:00 PM

I would definitely check into the firewall. RPC is port 135. However there are other services like WMI that if blocked can cause the same error. If possible I would try to disable the firewalls when attempting to join the computer to the domain.

Also for reference here is an extensive troubleshooting article - The RPC server is unavailable


All local firewalls are disabled on the DC as well as the individual machines but we are working with the people that manage their hardware firewall. Will also look into this article. Thanks much!




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