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Hi
When I sync SCCM SUP, WSUS stuck in 0% and after a while I get below error
Sync failed: UssCommunicationError: WebException: Unable to connect to the remote server > System.Net.Sockets.SocketException: A connection attempt failed because the connected party did not properly respond after a period of time, or established connection failed because connected host has failed to respond ip address:443 at System.Net.HttpWebRequest.GetRequestStream(TransportContext& ontext). Source: Microsoft.SystemsManagementServer.
SoftwareUpdatesManagement.WsusSyncAction.WSyncAction.SyncWSUS
I can browse Microsoft update catalogue. I turned off windows firewall but it is no use.
how can I troubleshoot?
Did it break all of a sudden? Has the sync ever worked? Do you use a Wsus server connection account?
yes it worked perfectly and I don't user server connection account
Thank you for posting in Microsoft Q&A forum.
You may check if your WSUS or SUP server can resolve the update.microsoft.com site by running the following command line:
nslookup update.microsoft.com
If the answer is the right solution, please click "Accept Answer" and kindly upvote it. If you have extra questions about this answer, please click "Add comment".
It's a "normal" business that from time to time (during many years of usage), WSUS "breakes". There are several maintaning tasks and tricks you could do about it.
https://www.prajwaldesai.com/troubleshoot-wsus-connection-issues-with-sccm/
https://www.anoopcnair.com/sccm-wsus-cleanup-fix-sccm-scan-timeout-errors/
Also, it is not a bad idea to build new WSUS from scratch, because it is quite easy thing to do :)