SCCM SUC Content signing certificates

Trying to setup Acrobat\DC updates via SCCM however.

Catalog "Adobe Acrobat DC" does not include content signing certificates, attempts to publish update content for updates from this catalog may be unsuccessful until content signing certificates are added and approved.

SyncUpdateCatalog: **** Warning: Catalog is old format, no content certificates are included and updates will not be deployable until certificates are trusted. **** SMS_ISVUPDATES_SYNCAGENT 06/09/2019 10:06:27 1600 (0x0640)

I have a valid distribution license, the catalog cert is imported and trusted (Ending 03/02/2021)

What else am I missing here?

Thanks.