Management points critical 0mb

[Mark C]

I've upgraded our configuration manager server OS from 2019 to 2022 and after running the CM reset and reinstalling wsus the main server and distribution points are all working, however all the management points apart from the CM server are showing critical and 0mb under Site Status.

The message log is showing Site System Status Summarizer detected that the storage object on site system has 0 KB of free storage space, which is less than or equal to the Critical Free Space Threshold of 5242880 KB.

The error only occurred after the OS upgrade, there's space on the servers which also act as distributions points which show the correct space in the site status. Removing and reinstalling the MP role hasn't made a difference.

Currently the MP role has been removed from the servers so the clients can communicate.

[anyweb]

I asked copilot about this and it replied as below:

Yes. Based on similar SCCM/MECM cases, the**"Management Point = Critical, Size = 0 MB / 0 KB free space"** symptom is usually not an actual disk space problem, but a failure in the Management Point health check or status reporting. [windows-noob.com], [forums.pra...ldesai.com]

For the specific post you linked, the key clues are:

• The issue started immediately after an OS upgrade from Server 2019 to 2022.
• Distribution Points report storage correctly.
• Only Management Points show 0 MB.
• Reinstalling the MP role did not help. [windows-noob.com]

Known causes seen in the field

1. MP Control Manager communication failures

   • A remote MP can install successfully but still show 0 Bytes / Critical if the MP health checks fail.
   • One documented case was caused by blocked ports (135/445), resulting in MP health failures until connectivity was restored. [forums.pra...ldesai.com]

2. Status Summarizer reporting issues

   • The "0 KB free storage space" message is generated by the Site System Status Summarizer.
   • Sometimes the summarizer data becomes stale or invalid after site/system changes and may need re-evaluation or resetting after the underlying issue is fixed. [learn.microsoft.com], [anoopcnair.com]

3. Permissions changes after OS upgrade

   • Server upgrades can alter local group memberships, WMI permissions, firewall rules, IIS configuration, or ConfigMgr service permissions, causing the site server to fail retrieving status information from remote MPs. This is a common post-upgrade symptom reported for MP health issues. [learn.microsoft.com], [learn.microsoft.com]

4. Firewall / RPC / SMB access

   • Since the site server gathers status information remotely, blocked RPC or file-sharing communications can cause the console to show 0 MB even when the disks have plenty of space. [forums.pra...ldesai.com]

Logs I would check first

On the site server:

 

mpcontrol.log

sitecomp.log

hman.log

statmgr.log

sms_site_system_status_summarizer.log

 

On the affected MP servers:

 

mpmsi.log

mpsetup.log

IIS logs

 

Things I'd verify

• Can the site server access \\MPServer\admin$?
• Are RPC (135) and SMB (445) reachable?
• Does mpcontrol.log show successful HTTP/HTTPS tests?
• Is the SMS Executive service healthy?
• Are the MPs running the same supported ConfigMgr version after the Server 2022 upgrade?
• Does reinstalling the MP role recreate the issue immediately or only after status summarization runs?

My suspicion, given the upgrade scenario and the fact that DPs report storage correctly, is that this is more likely a Management Point status collection/communication issue than actual storage detection, with mpcontrol.log and sms_site_system_status_summarizer.log being the most important logs to review. [windows-noob.com], [forums.pra...ldesai.com], [learn.microsoft.com]

If you can provide excerpts from mpcontrol.log and sms_site_system_status_summarizer.log, I can help pinpoint the exact failure.

[Mark C]

I've reinstalled the MP on one server and the Critical error 0mb appears straight away. Firewalls are disabled on the servers. There no errors showing in the message log for the MP, no errors on the MP log files, mpmsi.log and mpsetup.log

On the site server, there's no errors in sitecomp.log or statmgr.log,. sms_site_system_status_summarizer.log doesn't exist. hman.log shows 

Error: Could not create certificate binary

Failed to sign User Service Certificate for <server> of site

There's no errors in the mpcontrol.log. Http test request succeeded. There's no Https test and SSL is showing in the log not enabled.

[anyweb]

what version of sccm is it and are you running in HTTP mode ?