Error: This seat’s taken, domain has already been used

Generic selectors
Exact matches only
Search in title
Search in content
Filter by Categories
Account Management Help
add photos, video and audio
Add-on features and social media
Advanced
Advanced campaign settings
All about analytics
All about images
Basic steps
Calendar
Configure the Web Application Firewall (WAF)
Connect my Calendar and Online Storage to Workspace
contact support
copy files to my site
Create my email address
Customize campaign
Discover domains
discover linux hosting with cPanel
Discover Microsoft 365
Discover Online Storage
Discover Workspace Email
edit content
Email Marketing demo
expand your site with sections and pages
Explore email add-ons
Explore my account
Find server and port settings (IMAP/POP)
fine tune my website
get social
Get started with SSL certificates
Get the most out of Microsoft 365
help my site get found and monitor my metrics
Hosting & Servers
keep my account secure
Keep my email secure
know your privacy rights
Legacy
Manage your SSL certificate
Managed WordPress
Manual email configuration
Migrate and export my emails
My email account isn’t working (troubleshooting)
nameservers and DNS
online store
organize
parking, forwarding and monetizing
privacy and protection
publish my site
Quick Shopping Cart
Renew my products and services
renewals
Security
Set up a campaign
Set up email on my devices
set up my payment methods
Set up my Workspace Email account
start with the basics
Stay productive anywhere with Office apps
Streamline email tasks to help my business
transfer between accounts
transfer between registrars
Troubleshoot email and email setup
Troubleshooting
troubleshooting
Uncategorized
Upgrade and renewal options for email
Web & Classic Hosting
Website backups
Website Builder 7
Website Builder version 6
Website Security and Backups
Websites
work with databases
work with delegates
working with blogs

When setting up your domain and email for the first time in Microsoft 365 from ELITE WEB Co., you might receive this error if you’ve already used the domain with Microsoft:

This seat’s taken. Whoops! [Domain] has already been used to set up an Microsoft 365 account at Microsoft©.

This might happen if you set up your domain on an Microsoft 365 trial offer, and then purchased a plan later on. No worries, after you remove the domain from your Microsoft account, you’ll be ready to use your domain and email address with your Microsoft 365 from ELITE WEB Co. account.

Required: You must be in the new admin center to follow these steps.
The new admin center toggle

  1. Go to portal.office.com and choose your domain’s current account. Use your prior Microsoft 365 email address, password and select Sign in (your ELITE WEB Co. username and password won’t work here).
  2. Select Admin.
  3. Select Users > Active users.
    Users and Active users
  4. Select the check mark to the left of all users > the three dots > Change domains.
    Change domains
  5. Use the drop-down list to select the domain ending in xxxx.onmicrosoft.com and read the alert. Changing the domain will change your users’ email addresses, including yours. If their emails are also their usernames, this also changes how they sign in.
  6. Select Save changes, which will sign you out. If you don’t automatically sign out, select your profile icon and Sign out.
    Sign out
  7. Sign back in to portal.office.com, but this time, select Use another account to sign in using your email address with the xxxx.onmicrosoft.com domain. For example, if you signed in using jane@coolexample.com, you’ll now need to use jane@xxxx.onmicrosoft.com.
  8. Select Admin.
  9. Select Users > Active users.
  10. All of your users should now be on the xxxx.onmicrosoft.com domain. Make sure all aliases are removed by selecting the display name directly for one of your users. In the panel that opens, if you see Aliases, select Manage email aliases.
    Manage email aliases
  11. Select the trash can trash can to delete the aliases tied to the previous domain. Repeat for all users and Save changes.
  12. If you have groups or shared mailboxes, you’ll need to change the domain to xxxx.onmicrosoft.com for those as well. Select Groups > Groups.
    Groups
  13. Select the check mark to the left your group’s name, and Edit name and description.
    Select group and edit name and description
  14. After the @, use the drop-down list to change the domain name and Save. Select Close to exit the panel, and repeat for all groups and shared mailboxes on your domain.
  15. The domain can now be removed from Microsoft. Select Setup.
    Setup
  16. Next to Sign-in and security, select View under Get your custom domain set up.
  17. Select Manage.
  18. Select the check mark next to a xxxx.onmicrosoft.com domain and Set as default.
    Set as default
  19. Select the check mark next to your custom domain > select the three dots > Remove domain.
    Three dots and remove domain
  20. Select Remove. Your domain was removed from Microsoft and now you can create new users in your Microsoft 365 from ELITE WEB Co. account!

Related step

More info