Microsoft Security | Intune | Configuration Manager | Updates
Managing and deploying updates via Configuration Manager
Hi GH,
According to the logs, it seems that SCCM can't connect to WSUS Server.
Here is a reference thread:
SCCM WSUS Sychn Failed
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Hafedh Guiga
35
Reputation points
Hello everyone
I'm facing an issue of WSUS Sync Manager for many weeks.
the problem is that it's failing for some attemps and then without doing any change it succeeded in the next retry and it's always the same thing each day.
The first 02, 03 or 04 attemp failed and then it secceeded.
This is what i found:
from wsyncmgr.log:
Sync failed: The underlying connection was closed: The connection was closed unexpectedly. Source: Microsoft.UpdateServices.Internal.ApiRemoting.ExecuteSPGetParentCategories
STATMSG: ID=6703 SEV=E LEV=M SOURCE="SMS Server" COMP="SMS_WSUS_SYNC_MANAGER" SITE= PID= TID= GMTDATE=mar. janv. 31 03:08:03.061 2023 ISTR0="Microsoft.UpdateServices.Internal.ApiRemoting.ExecuteSPGetParentCategories" ISTR1="The underlying connection was closed: The connection was closed unexpectedly" ISTR2="" ISTR3="" ISTR4="" ISTR5="" ISTR6="" ISTR7="" ISTR8="" ISTR9="" NUMATTRS=0 LE=0X80131509
Sync failed. Will retry in 60 minutes
from wcm.log:
Remote connection failed with exception 'System.Net.WebException: The underlying connection was closed: The connection was closed unexpectedly.~~ at Microsoft.UpdateServices.Administration.AdminProxy.CreateUpdateServer(Object[] args)~~ at Microsoft.SystemsManagementServer.SoftwareUpdatesManagement.WsusSyncAction.WSyncAction.DoSync()'. Attempting to bypass proxy
Sync failed: The underlying connection was closed: The connection was closed unexpectedly. Source: Microsoft.UpdateServices.Internal.ApiRemoting.ExecuteSPGetParentCategories
Sync failed. Will retry in 60 minutes
SCCM and WSUS are up to date with the last updates and configuration version.
If it was a proxy/FW, it'll be always blocked and i've checked the TLS 1.2 and it's OK.
Thanks in advance.
GH
Microsoft Security | Intune | Configuration Manager | Updates
Microsoft System Center | Other
Microsoft System Center | Other
Additional System Center tools and components for managing infrastructure, applications, and services
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TrudaZeng-MSFT 771 Reputation points2023-02-03T09:48:20.4333333+00:00 -
Hafedh Guiga 35 Reputation points
2023-02-06T09:40:33.87+00:00 Hello Truda and thanks for your response,
i have checked and isn't exactly the same issue that i have.
For my it's failing one or two times and then it succeed without any intervention.
I was also checking the exit code error and the bahviour and isn't also the same.
Thanks.
GH
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Imane El Machkouri 0 Reputation points2026-06-03T15:35:01.6966667+00:00 Hello ,
We are experiencing an issue with Software Update synchronization in our SCCM environment integrated with WSUS.
Environment:
- SCCM installed on Windows Server 2019
- WSUS configured with HTTPS (port 8531)
- TLS 1.2 enabled
- WSUS and SCCM SUP role are installed and running correctly
- Connectivity to Microsoft Update endpoint
https://sws.update.microsoft.comis successful
Issue Description: When launching a Software Update synchronization from SCCM or WSUS:
- Synchronization remains at 0%
- After some time, the status changes to "Cancelled" in the WSUS console
- No new updates are downloaded
However, the
WsyncMgr.logshows:-
Sync succeeded -
Done synchronizing SMS with WSUS Server - No explicit errors or SoapExceptionsHello Microsoft Support, We are experiencing an issue with Software Update synchronization in our SCCM environment integrated with WSUS. Environment:
- SCCM installed on Windows Server 2019
- WSUS configured with HTTPS (port 8531)
- TLS 1.2 enabled
- WSUS and SCCM SUP role are installed and running correctly
- Connectivity to Microsoft Update endpoint
https://sws.update.microsoft.comis successful
When launching a Software Update synchronization from SCCM or WSUS:- Synchronization remains at 0%
- After some time, the status changes to "Cancelled" in the WSUS console
- No new updates are downloaded
WsyncMgr.logshows:-
Sync succeeded -
Done synchronizing SMS with WSUS Server - No explicit errors or SoapExceptions