How to change a secondary domain to domain alias

Problem

How do you change a secondary domain to domain alias?

Environment

  • Admin console

Solution

Go to the Admin console and:
  1. Delete any groups associated with this domain.
  2. Remove any user aliases associated with this domain.
  3. Rename any users associated with this domain.
Remove the domain:
  1. Go to the Admin console and click on Manage domains under Domains.
  2. Scroll to the domain you're removing, and click Remove.
Add the domain as a Domain alias:
  1. Click Add a domain.
  2. Type the domain and select User alias domain option.
  3. Click Add domain and start verification.
  4. Follow the on-screen steps to complete the verification. 
Note: Usually, you can reuse a domain's name in your current Google Workspace account within 30 minutes of removing it. However, if the domain had many users, you might need to wait up to 24 hours.