Hi @Lucas Vorms ,
Which log should I read in order to troubleshoot that ?
As the error message shows: You do not have adequate user rights to make changes to the target computer.
So you can apply your leader to add your log in account to the Administrator Group and then have a test.
More information: http://blackwaterconfig.com/configuring-wsus-sup-with-sccm-current-branch/
BR,
Mia
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