Not sure if this will work for everyone....

Error: Unable to fetch values from ServiceDesk Plus, The server might not be running or the network traffic may be too high

This I think is a generic error that something is wrong with one or more of the parameters you have specified.

1. Make sure you have completed the standard configuration: http://www.manageengine.com/products/service-desk/opmanager-integration.html and that you get the above error.

2. Check that you can load up the client (web browser) on the server (Windows) that hosts ServiceDesk+ and/or Opmanager (I have both installed on the same server). That is that you can logon to the ServiceDesk and OpManager server from the ServiceDesk server and vice versa. If you have problems check this link: http://www.eggheadcafe.com/software/aspnet/30793765/cannot-add-trusted-sites.aspx

3. Setup a new techician in ServiceDesk (I setup with Admin privileges), do this even if you have AD enabled. Configure the OpManager ServiceDesk+ connector to use this new account.

4. Other things to test. From the OpManager server try to telnet to the ServiceDesk+ server (Telnet Server ServiceDeskPort)

5. Make sure you are using the latest version of both servers.

Good luck.