Before installing the eConnect Runtime, make sure you have the prereqisites installed. The launch the setup utility and select eConnect from under the Additional Products heading.
Accept the terms of the License Agreement and click Next:
Make sure the Incoming-Outgoing Service feature is selected; if it is not and you cannot select it, this means you do not have the MSMQ Triggers installed (which is one of the prerequisites I mentioned); click Next to proceed:
Enter the dlogon details of the eConnect Service User (this is the account mentioned in the prerequisites) and click Next:
Enter the full instance name of the SQL server and the Dynamics GP System Database name and click Next:
Click Install to begin the installation:
Once the installation is complete, click Exit: