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Heads up - Seems to be some trouble with Defender definition updates

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I noticed this morning (after patch tuesday) that some patches were missing on our SUP. Furthermore, SMS_WSUS_SYNC_MANAGER had this weird error:

WSUS Synchronization failed.
 Message: ImportUpdateError: .
 Source: Microsoft.SystemsManagementServer.SoftwareUpdatesManagement.WsusSyncAction.WSyncAction.SyncWSUS.

And wyncmgr.log had this:

Sync failed: ImportUpdateError: . Source: Microsoft.SystemsManagementServer.SoftwareUpdatesManagement.WsusSyncAction.WSyncAction.SyncWSUS
STATMSG: ID=6703 SEV=E LEV=M SOURCE="SMS Server" COMP="SMS_WSUS_SYNC_MANAGER" SYS=[FQDN-NAME-OF-SERVER] SITE=XXX PID=3036 TID=7664 GMTDATE=ons jun 13 17:41:41.389 2018 ISTR0="Microsoft.SystemsManagementServer.SoftwareUpdatesManagement.WsusSyncAction.WSyncAction.SyncWSUS" ISTR1="ImportUpdateError: " ISTR2="" ISTR3="" ISTR4="" ISTR5="" ISTR6="" ISTR7="" ISTR8="" ISTR9="" NUMATTRS=0

After some troubleshooting I found that deselecting either the category 'Definition updates' or the product 'Windows Defender' made the error go away.

Googling and troubleshooting all day, I finally found this on Technet:

Looks like there might be a bug somewhere...

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good to hear it


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