We can export downloaded patch data from the repository used by the UMDS to a shared location so that the Update Manager server can be configured to use this shared location.
vmware-umds -E --export-store repository_path
vmware-umds -E --export-store C:\PatchRepo vmware-umds -E --export-store \\vcenterhost001\atvc
The command copies the data from the patch store to the shared repository. You have to periodically export the patch data to keep the shared repository up to date. The shared repository folder should have read permissions over the network.