How to Find Your Microsoft 365 Host Name
Our support team may request your Microsoft 365 host name if you need to smart host to allow phishing emails to reach your users.
- Log in to your Microsoft 365 Admin Center.
- If you have the domains card on your home page, click the Domains header.
If you do not have the domains card, open the menu to the left and go to Settings > Domains.
Select your domain.
You can find your host name next to your MX value under Exchange Online.