vSphere 6 strikes again.
After an upgrade from vSphere 6 to vSphere 6 Update 1 all of our Veeam backups were failing with the message
"Processing VirtualMachineName Error: NFC storage connection is unavailable. Storage: [stg:datastore-42,nfchost:host-174,conn:vCenterServer]. Storage display name: [datastore]. Failed to create NFC download stream. NFC path....."
Here are a couple of write ups I found after the fact. Had I known, I probably would have held off a few more weeks before upgrading.