In order to connect to your backend system via SAP Router, install Overcast and set up the Endpoint in the Settings tab, first. Click here for more details.
Connection with the SAP system can either be established via SAProuter for increased security, or directly if the system is publicly accessible. Please read the Connection String Settings section for further details.
Add your connection string to the whitelist.
Connection strings are what connect your backend system to Salesforce through Overcast.
You will create two connection strings, one for connecting to your Salesforce instance and the other for your backend system.
1. Select Connection Strings tab (1) and select the New button (2).

2. Create a new Connection String for your Salesforce instance.
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3. On the connection string record, select the Check button to ensure the connection can be established successfully.
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A green checked circle will appear once a successful connection is made.
If you modify a connection string after running the check, you will need to re-run the check; otherwise, the status may display an incorrect/previous value.

Note: If you did not append your Security Token to the Password in Sensitive Part field, you may receive an error message:
To correct this error, navigate to your Settings > My Personal Information > Reset My Security Token and select Reset Security Token. Once you receive an email, append the security token to your password.

4. Repeat Steps 1-3 above to set up a connection string for the SAP Database.
Note: Ensure that the owner of these records is an active user.