SCCM Server Groups

What Are Server Groups?

Within SCCM Assets and Compliance you can create a collection containing Server Client membership. Once the 'Server Group' feature is enabled the properties of the collection will contain an additional option to declare that all members of the collection are part of a server group. This means SCCM knows that the servers within this collection must be treated with specific logic and settings.

In the example below the collection contains three nodes of a cluster and only one node may be Software Updated at a time.

Once policy is received for the Software Update Group deployment an election is held in which one of the nodes will engage a lock state forcing the other nodes to wait until it has been released.

The UpdatesDeployment.log details the 'Lock State'. Once the node has taken the lock (Lock State: 1) the server will then run the 'Node Drain Script' and continue if the script has an exit code of 0 zero or if the script times out (600 seconds default).

After the main deployment is complete the 'Node resume script' is run and the lock state is returned to 2.

'Node Drain Script' [Untested in Production]

'Node resume script'
Resume-ClusterNode

Lock States
There are four lock states:

Waiting for Lock: 0
Have Lock: 1
Released Lock: 2
Node Script Failed: 3

The SQL script below will report on all Server Groups with Pre and Post Actions as well as current client Lock states.

Windows 7 Offline files will not go Online when connected to network

Issue Several laptop users move between networks, domain, home, etc and when they attempt to access DFS shares explorer status is working offline. The issue only resolves it self after a reboot. Connecting directly to the share works and i am able to ping network resources. This behavior occurs for VPN users as well. Possible Causes "slow-link mode". In win7 (with default settings) a client will enter slow-link mode if the latency to the server is above 80ms. In slow-link mode all writes are made to the local cache and a background sync only happens every 6 hours. Depending on your connection the default slow link detection speed is 64,000 bps On client computers running Windows 7 or Windows Server 2008 R2, a shared folder automatically transitions to the slow-link mode if the round-trip latency of the network is greater than 80 milliseconds, or as configured by the "Configure slow-link mode" policy. After transitioning a folder to the slow-link mode, Offline Fil

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Soon after installing SCCM CB 1702 we were unable to see Task Sequences deployed to the unknown collection. This issue was identified as a random system taking the GUID of the 'x64 Unknown Computer (x64 Unknown Computer)' record. As a result it was now a known GUID; as we were only deploying Task Sequences to the Unknown collection none were made available. 'x64 Unknown Computer (x64 Unknown Computer)' record 'x86 Unknown Computer (x86 Unknown Computer)' record To get the GUID of your unknown systems open SQL management studio and run the following command: --Sql Command to list the name and GUID for UnknownSystems record data select ItemKey, Name0,SMS_Unique_Identifier0 from UnknownSystem_DISC Using the returned GUID (SMS_Unique_Identifier0) we can find the hostname that has been assigned the 'x64 Unknown Computer (x64 Unknown Computer)' GUID by running the query below. --x64 Unknown Computers select Name0,SMS_Unique_Identifier0,Decommissioned0 from Sys

SCCM Client Certificate (PKI) Value is None

SCCM Client Certificate (PKI) Value is None Symptoms: Are you seeing the following errors logged? ClientIDManagerStartup.log - Error: 0x87d00231 [RegTask] - Client is not registered. Sending registration request for GUID:12345678...98C1AE ... RegTask: Failed to send registration request message. Error: 0x87d00231 ClientIDManagerStartup RegTask: Failed to send registration request. Error: 0x87d00231 ClientIDManagerStartup LocationServices.log Failed to send management point list Location Request Message to SiteServer.Domain.local 1 assigned MP errors in the last 10 minutes, threshold is 5. CcmMessaging.log Status Agent hasn't been initialized yet. Attempting to create pending event. Successfully queued event on HTTP/HTTPS failure for server 'SiteServer.Domain.local'. Post to https://SiteServer.Domain.local/ccm_system_windowsauth/request failed with 0x87d00231. Failed to open to WMI namespace '\\.\root\ccm' (80041003) Failed in WinHtt

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