HPOV Network Node Manager & Exchange

I have been tasked to find out how I can retrieve Exchange MIB information from a Exchange server using Network Node Manager on HP-UX. I know ManageX works with NNM on NT, and Exchange SPI works with VPO. But what can I do to just read the MIB using snmpwalk or the MIB Browser. I can see all other MIB’s on the server, however when I want to look at the Exchange MIB with the MIB Browser I get “Error:SNMP: Variable does not exist or access is denied.

I know the variables exist since I’veseen it on the server. Community Strings are correct since I can see other MIBs. Did I forget to order my secret decoder ring from MicroSoft so I can look at this MIB?