This Knowledgebase article provides information about errors generated during the installation of Neverfail for Exchange on Windows 2000 by NTbackup on the Primary server.
During the installation of Neverfail for Exchange on Windows 2000, the NTbackup
operation on the Primary server may generate errors of the following type in
Windows Application Event Log:
The 'ESE API' returned 'Unable to perform the operation'. Either you can not
connect to the specified server or the service you are trying to connect to is
There is a known issue with ntbackup and Exchange on Windows 2000.
The errors can be safely ignored.
Neverfail for Exchange with Windows 2000
For further information, see http://support.microsoft.com/kb/306342/en-us .