We are running Config Manager 2010 and are getting an Error: Failed to download content id 17836855. Error: Invalid certificate signature.
This is not happening on the older release Microsoft 365 Apps Update.
This issue looks to be the exact same that was experienced last November/December and the "solution" was to Uninstall October 2020 Update KB4577668.
Then there was a hotfix that came out for Config Manager that resolved this.