Step 1 : In Microsoft 365, in the header, click on Admin. 

Step 2 : Under Settings , click on Domains and enter your domain. Click Next 

Step 3 : From the table on the Verify Domain page, copy the Destination or Points to Address information. 

Step 4 : Go to your  DNS provider domains page. (we have taken the example of Godaddy) 

1. Select Save. 
2. Wait a few minutes before you continue, so that the record you just created can update across the Internet. 

Now that you've added the record at your domain registrar's site, you'll go back to Microsoft and request the record. 

When Microsoft finds the correct TXT record, your domain is verified. 

1. In the Microsoft admin center, go to the Settings > Domains page. 
2. On the Domains page, select the domain that you are verifying. 
3. On the Setup page, select Start setup. 
4. On the Verify domain page, select Verify.