Verification of your domain in Azure is essential. StealthMail won’t be able to operate correctly without it.
To verify your main domain you need:
Sign in to the Azure portal.
In the main list pick Azure Active Directory next in side list pick Custom Domain Names then in the opened frame click Add custom domain button.
Enter your domain name in appeared frame, and click Add domain button below.
Next you should add a TXT record with your domain name registrar. Use data from the form.
After you have added a TXT record you may try to verify your domain by clicking Verify button.
Please Note: Generally you may successfully verify your domain in 5 minutes after adding TXT record. But it may take up to 72 hours before TXT records become updated, it depends on your domain name registrar.
The screen below shows a case when TXT record is not yet updated, and Azure cannot verify the domain. In this case to not to waste the time you may go through other steps of the deployment guide and then back to this one.