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I have seen multiple servers/workstations in our AD that are in gpresult /R show Site Name: N/A even thou their subnet is defined in Active Directory Sites and Services. What could be the reason for that? Where to look for possible failure. Because of this some stuff like detecting Exchange server in same subnet doesn't work. Replication seems to work fine.

C:\Users\admin>nltest /dsgetsite
Katowice-Kolokacja
The command completed successfully

C:\Users\admin>nltest /dsgetdc:domain.com /Account:KOLCENTRAL$
           DC: \\AD7.domain.com
      Address: \\172.16.50.7
     Dom Guid: 2d9bd8bc-3124-44ca-b2cb-960159dd75e2
     Dom Name: domain.com
  Forest Name: domain.com
 Dc Site Name: Katowice-Kolokacja
Our Site Name: Katowice-Kolokacja
        Flags: GC DS LDAP KDC TIMESERV WRITABLE DNS_DC DNS_DOMAIN DNS_FOREST CLO
SE_SITE FULL_SECRET WS 0x4000
The command completed successfully


C:\Users\admin>gpresult /R

Microsoft (R) Windows (R) Operating System Group Policy Result tool v2.0
Copyright (C) Microsoft Corp. 1981-2001

Created On 3/18/2013 at 10:00:00 PM


RSOP data for DOMAIN\admin on KOLCENTRAL : Logging Mode
------------------------------------------------------------------

OS Configuration:            Member Server
OS Version:                  6.1.7601
Site Name:                   N/A
Roaming Profile:             N/A
Local Profile:               C:\Users\admin
Connected over a slow link?: No

Ip address

 IPv4 Address. . . . . . . . . . . : 172.16.50.200(Preferred)
 Subnet Mask . . . . . . . . . . . : 255.255.255.0
 Default Gateway . . . . . . . . . : 172.16.50.254

 DNS Servers . . . . . . . . . . . : 172.16.50.7
                                     172.16.50.8

Sites and Services:

enter image description here

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Can you please share with us the output of nltest /dsgetsite and nltest /dsgetdc:your.domain.com /Account:BustedPC01$ from one of the affected PCs. –  Ryan Ries Mar 18 '13 at 20:56
    
updated question with information –  MadBoy Mar 18 '13 at 21:03

2 Answers 2

up vote 3 down vote accepted

This is just a display problem. Your Sites & Subnets are fine. The client knows to which site it belongs, as evidenced by the nltest output. My Windows 7 client here shows N/A in gpresult /R as well.

gpresult /R when run from an un-elevated command prompt only shows data for the user, and the user doesn't really have a "Site" in the same sense that the computer does. The user inherits her locality from the computer she logs on to.

Run gpresult /R from an elevated command prompt and you should see Computer settings as well, which will show you the proper site name. And the user section won't even have a Site Name property listed any more.

I say the source of your Exchange problems lie somewhere else...

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You are right. After elevating it shows proper site. Thanks a lot. –  MadBoy Mar 18 '13 at 21:20

Check to make sure that the subnet masks in AD Sites and Services are correct. I ran in to this problem once where the subnet masks on were 255.255.0.0 on the client machines but AD had /24's defined.

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It doesn't seems so. Check updated question –  MadBoy Mar 18 '13 at 21:04

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