My Domain FAQ and Troubleshooting for Sales and Service with Salesforce

This article is organized as a FAQ covering the most common My Domain issues in Sales and Service. Use the section headings below to navigate to the question that matches your issue.

Changing a Configured My Domain in Sales and Service

Yes, you can change a configured My Domain after it has been deployed. For instructions on how to update your My Domain name or subdomain details, see Change Your My Domain Details.

Cannot Log In to Salesforce After My Domain Deployment

If users are unable to log in to Sales or Service after My Domain deployment, follow these troubleshooting steps in order:

1. Verify that the required Salesforce domains are allowed in your organization's network. Ask your network administrator to check that all required Salesforce domains are registered on your organization's allowlist. For the full list of required domains, see Allow the Required Domains.

2. If you access Salesforce via VPN, disconnect the VPN to determine whether the VPN is causing the login issue.

3. Verify whether login from https://login.salesforce.com is blocked by your My Domain login policy:

   1. From Setup, enter My Domain in the Quick Find box, then select My Domain.

   2. In the Policies section, check whether Prevent login from https://login.salesforce.com is selected. If it is selected, users cannot log in from https://login.salesforce.com.

   3. If this setting is enabled, inform users to log in using their My Domain URL: https://<subdomain>.my.salesforce.com.

Note: If the issue persists after completing the steps above, take a screenshot of the error screen and contact Salesforce Support.

Cannot Redirect from the Old Instance URL

If your organization cannot redirect users from the old instance URL to the new My Domain URL, verify your redirect policy by following these steps:

1. From Setup, enter My Domain in the Quick Find box, then select My Domain.

2. In the Policies section, check the current redirect setting. If Don't redirect (Recommended) is enabled, redirects from the old URL will not work.

3. Change the setting to Redirect to the same page within the domain or Redirect with a warning to the same page within the domain to enable redirects.

For more information on My Domain login and redirect policies, see Set the My Domain Login Policy.

My Domain Was Configured Automatically

My Domain was automatically deployed by Salesforce in the Winter '22 release for all orgs that did not yet have a My Domain configured. This was part of a release update to ensure all orgs benefit from My Domain security and feature improvements.

For more information about this release update, see Deploy a My Domain (Release Update).

Changes to Logging In from login.salesforce.com

If Prevent login from https://login.salesforce.com is enabled in your org's My Domain login policy, users must log in from your configured My Domain URL (for example, https://sample.my.salesforce.com) instead of the standard login page.

For users accessing Salesforce from the Salesforce mobile app, the login server must be updated to reflect your My Domain URL. To update the login server in the Salesforce mobile app, see Switch Login Server in Salesforce Mobile Apps.