Hi, @Kevin
Thank you for posting in Microsoft Q&A forum.
When SCCM updates get stuck in the "Downloading" state, it may be caused by download failures during the downloading of the manifest cab or the actual Easy Setup package.
To troubleshoot this issue, you can collect the following data before starting:
Hman.log
DMPDownloader.log
Files inside each subfolder of Hman.box
Output of the following SQL queries:
select * from CM_UpdatePackages
select * from CM_UpdatePackageSiteStatus
Output of the following registry keys:
HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\SMS\COMPONENTS\SMS_DMP_DOWNLOADER
HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\SMS\AIUS
HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\SMS\SMS_DMP_CONNECTOR
Check DMPDownloader.log to see whether the service connection point is downloading files.
For connection issues, verify whether the Internet access requirements are met. If the issue persists, try to download the content manually by accessing the URL for the content. You can find the URL by reviewing DataTransferServices.log.
For the references:
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