When I try to import a update from Windows Update Catalog into my Windows Server Update Service,I get a 80131509 error.
Why is this happening, how can I solve it?
Besides searching on google, I came to the solution myself.
Import from Microsoft Update Catalog won't work if your server has a upstream synchronization server other than microsoft. I mean a parent WSUS.
The solution is to change the upstream synchronization server back to microsoft update, import the update package and then change to your parent WSUS again.