Configure your new Org-Wide Email address using the steps outlined in the article Configuring Org-Wide Email addresses. For more information on Organization-Wide Email Addresses, see the Salesforce Help & Training article: Organization-Wide Email Addresses.
Once you’ve configured your new Org-Wide Email address, verify that the email was changed in the following locations:
Verify/Update any Org-Wide email addresses that have been configured on your Application Forms:

Note: you can create a new List View and include the Org Wide Email field to quickly review your forms. For details on working with List Views, see the Salesforce Help & Training article: Work with List Views in Lightning Experience.
Verify/Update the Email Sender field on your Events:

Note: you can create a new List View and include the Email Sender field to quickly review your Events. For details on working with List Views, see the Salesforce Help & Training article: Work with List Views in Lightning Experience.
Review the Default Email Sender ID in Events Custom Settings. For details on setting the Default Email Sender in Events, see the article: Setting the default email sender in Events.

Review the From Name for each of your Sites:

Review any Email alerts associated with Active Workflows/Process Builders:

For details on Email Alerts, see the Salesforce Help & Training article: Email Alert Actions.
Review/Update the From Name/From Email and Reply Name/Reply Email fields in each TargetX Builder Campaign:

If you have implemented Zoom Integration with Salesforce and configured an outbound email for all your meeting invitation emails, you’ll want to review/update the Mail Default From Address in your Setting up Zoom connector in your org:

If you are using Faculty Early Alerts Overview, verify the Org-wide Email Address listed for Kudos and Alerts:

Verify the From Email in Access Key Settings. This is the email address that is used to send Access Key requests.
