I obtained the credentials using the method as suggested.

I also need to obtain following information in a report before synchronizing:

     'snmp-server host xx.xx.xx.xx '

In addition, if you have amended the 'community string' on some devices manually (bypassing Ciscoworks) and the scheduled configuration update now fails (polling failure), what is the best way to force a manual configuration update to these changed devices?

Thanks.

Getting the SNMP trap community string is not trivial.  The reason for this is that anything which shows the configuration will have this field starred out. You can get to the value, but not in a report-like fashion.  You can, however, search the archived configs under RME > Config Mgmt > Archive Mgmt > Search Archive.  Assuming you know the SNMP trap receiver IP, you could search on:

snmp-server host x.x.x.x old-string

That would show you all devices that still had the old community string.

If you need to force RME to get the new config data, you can simply schedule a Sync Archive job under RME > Config Mgmt > Archive Mgmt > Sync Archive.  Of course, if you made the changes outside of LMS, you will need to manually update DCR with the new community string.