- To find your username
- Sign in to BT Business Apps using your BT.com username and password
- On the MyApps page, click the wheel to the right of the Office 365 logo - and select Manage App
- Click Domain.
- Your Onmicrosoft.com domain will be: [YOUR-CUSTOM-SUBDOMAIN].onmicrosoft.com
- Your Office 365 admin username will be: admin@[YOUR-CUSTOM-SUBDOMAIN].onmicrosoft.com
Lost/forgotten your password?