Each cluster supports multiple connectors for Salesforce. If you want to configure more than one instance of the connector for Salesforce, each Salesforce account must be configured with a unique URL. Configuring the URL requires Salesforce assistance, and it often takes at least a day to complete.
Log in to the Salesforce administration web page.
Click Administration Setup > Domain Management > My Domain.
Provide a unique subdomain name for your organization and click Check Availability.
If the subdomain you specified is available, select the check box to indicate that you agree to the terms and conditions, then click Register Domain.
Wait for Salesforce to register your domains. This process takes time.
After the registration is complete, Salesforce provides you with a URL that supports SP-initiated logins and is similar to the following:
https://<custom_name>.mysalesforce.com