Hi @Marek ,
Dell Update is the kind of Partner catalogs. Partner catalogs are software vendor catalogs that have their information already registered with Microsoft. Hence we can subscribe to them without having to specify any additional information.
Here are some steps we could refer to:
Step 1: Enable SSL on Software Update Point
Step 2: Enable SCCM third-party updates on Software Update Point
Step 3: Configure WSUS signing certificate on Software Update Point
Step 4: Enable third-party updates on the clients – Client Settings
Step 5: SCCM Catalogs for Third-Party Software Updates – Adding Custom Catalog
Step 6: Subscribe to a SCCM third-party catalog
Step 7: Synchronize Third Party Updates
Step 8: Publish and deploy third-party software updates
About screenshot for steps, please refer to this article:
https://learn.microsoft.com/en-us/mem/configmgr/sum/deploy-use/third-party-software-updates
https://www.prajwaldesai.com/sccm-catalogs-for-third-party-software-updates/
Note: This is non-official Microsoft article just for your reference.
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