Manually Installed Agent is not showing up in the Operations Manager Console Under Pending Management.

Question

Hi Community,
I submitted this question because I'm a bit stuck with SCOM 2012 R2, I'll try to explain briefly what is happening right now in my environment,  we have a DEV SCOM Deployment in which all the roles are installed in a single server, this servers is a
VMware machine running Windows Server 2008R2.
The Initial installation of the SCOM Operations Manager and all the other components was not performed by me but by a co-worker, unfortunately he doesn't remember much about the initial configuration. So i had to pickup where he left things about a year
ago, neither of us are SCOM experts, and we have almost no previous experience with previous versions of this application.
Now the problem that I'm facing is the following, all the DEV Servers are Domain Controllers and one of the indication within the "Guide for System Center Management Pack for Active Directory for Operations Manager 2012" states the following
Configuration
Supported?
Agent-less monitoring
No
After my first review I notice that our servers were being monitor by agent-less mode and given the above statement from the Operations Guide the only way that we could ever get those domain controllers monitor by SCOM would be by installing the agent on
each server, so I read somewhere (Can't remember where) that in order to install the agents in all the servers I should first remove them from the Agent-less node, which I did. Then I tried to use the discovery wizard to get the agent install in all of them
but it didn't matter how many times I try the servers never show up.
I read in a Tech Net Article that you had to modify the security settings so SCOM would let me decide if I wanted to approve it or not.
--> http://technet.microsoft.com/en-us/library/hh212853.aspx
I performed the suggested steps from the article but still the servers were not showing up, not even if I run the Discovery wizard, so I decided to go and perform the installation manually in a couple of servers I was able to install the agent in one of
the Domain Controllers, I configured the agent to use a service account that has Domain Admin rights. An hour after I installed the agent I went back to the Operations Console Manager and I check under Pending Action but the Server was not showing up. So i
went back to the Internet to try to find out if someone else had experience the same problem, and in one website some mentioned that if the servers were not showing up it was probably because they were still register in the SCOM Database, now I have no idea
of how i can check that or How can i remove them from there to have them available again, but what troubles me the most is that even after i installed the agent manually the server were not being recognize.
I went to the Event Viewer and I found one particular event that caught my attention, see below :
Log Name:      Operations Manager
Source:        Health Service Modules
Date:          6/12/2014 12:48:19 PM
Event ID:      11551
Task Category: None
Level:         Error
Keywords:      Classic
User:          N/A
Computer:      MyManagementServer
Description:
Computer verification failure for Machine Name: MyManagementServe is 0x800706BA. The RPC server is unavailable.
Event Xml:
<Event xmlns="http://schemas.microsoft.com/win/2004/08/events/event">
  <System>
    <Provider Name="Health Service Modules" />
    <EventID Qualifiers="49152">11551</EventID>
    <Level>2</Level>
    <Task>0</Task>
    <Keywords>0x80000000000000</Keywords>
    <TimeCreated SystemTime="2014-06-12T16:48:19.000000000Z" />
    <EventRecordID>1945680</EventRecordID>
    <Channel>Operations Manager</Channel>
    <Computer>MyManagementServer</Computer>
    <Security />
  </System>
  <EventData>
    <Data>MyManagementServe</Data>
    <Data>0x800706BA</Data>
    <Data>The RPC server is unavailable.</Data>
  </EventData>
</Event>
Not sure if this is related to the problem that I'm facing right now, but , I make sure that the RPC Services were running and also the related dependencies too. There's no Firewall enable in any of the servers and DNS seems to be working properly.
Ports 135 / 5723 are open and listening so since I ran out of ideas, I would like to know if some of the experts in this field could perhaps give me some guidelines.
There's one caveat that I haven't mention yet and that is related to SQL, I checked and my user just has read access to SQL i'm not sure if that could affect this but i think is worth mentioning.
My main goal is to have all the servers showing up in the Operations Manager Console.
So thanks all in advance !
Oscar Loria

Answer 1

So you can ping and nslookup from your ms to these agents and vice versa right?  I wouldn't do a manual install, I would push the agent from the management server.  You can uninstall the agent manually, or use cleanmom to get rid of them.  Then
do an install from the console.  When you initiate the install from the console (management server), should it run into any issues it will dump out an error which will give you an idea of where the problem may be.
From Holmans post on this:
e MOM Server could not execute WMI Query "Select * from Win32_OperatingSystem" on 
computer “servername.domain.com” 
Operation: Agent Install 
Install account: DOMAIN\account 
Error Code: 800706BA 
Error Description: The RPC server is unavailable.
The MOM Server could not execute WMI Query "(null)” on 
computer “servername.domain.com” 
Operation: Agent Install 
Install account: DOMAIN\account 
Error Code: 800706BA 
Error Description: The RPC server is unavailable.
8004100A 
800706BA
1.  Ensure agent push account has local admin rights 
2.  Firewall is blocking NetBIOS access.  If Windows 2008 firewall is enabled, ensure “Remote Administration (RPC)” rule is enabled/allowed.  We need port 135 (RPC) and the DCOM port range opened for console push through a firewall.  
3.  Inspect WMI service, health, and rebuild repository if necessary 
4.  Firewall is blocking ICMP  (Live OneCare) 
5.  DNS incorrect 
http://blogs.technet.com/b/kevinholman/archive/2009/01/27/console-based-agent-deployment-troubleshooting-table.aspx
Regards, Blake Email: mengotto<at>hotmail.com Blog: http://discussitnow.wordpress.com/ If my response was helpful, please mark it as so, if it answered your question, then please also mark it accordingly. Thank you.