Hi Gareth,
the 3 issue you reported:
1. Failed on 'SNAPCENTERVMNAME' Activity 'Discovering Resrouces# failed with error: DIscover resource enumeration returns null or empty.
2. Failed on 'SNAPCENTERVMNAME' Activity 'Unquiescing Application' failed with error: The operation has timed out.
3. Failed on 'SNAPCENTERVMNAME' Activity 'Creating Snapshot' failed with error: Create snapshot "Snapname" failed: Error: The credentials for the storage system.
issue 1 and 3 : please make sure SVM(Storage Virtual Machine are added to the VSC). If its already added just do modify and reapply the password. SC will update the Storage connection.
Note: you need to add the snapvault SVM also in VSC.
Issue 2: its purely application "quiescing and unquiescing" at load. try again this operation after doing the above changes of storgae connection.
let me know if its resolves the issue.
thanks
Neeraj