When CPUU is run on a machine with the Outlook 2016 client, it immediately fails and the following error is written to the CPUU log file:
9/27/2017 10:43:57 3880 [Trace] AutoDiscover settings were not found.
9/27/2017 10:43:57 3880 [Error] Failed to back up the ExcludeSCPLookup value of registry key 'Software\Quest\CPUU\HiddenBackup'.
Standard result: 0x00000002, Description: The system cannot find the file specified.
Stack: 0041B7DB 004197C3 004983F1 0049834B 005D4742 005D094A 005CFE2A 0042915D 004289DC 00438200 0063C021 BaseThreadInitThunk RtlInitializeExceptionChain RtlInitializeExceptionChain
9/27/2017 10:43:57 772 [Info] --- END LOG ---