I try like this :
I have input my custom domain and click validate. It appears like a picture. I was confused what should I do next. There is no verify button
If I check on docs https://learn.microsoft.com/en-us/azure/active-directory/fundamentals/add-custom-domain, there exist verify button
How can I solve this problem?
The issue will occur if you haven't added a CNAME record pointing to your website(sitecore-xxxxx-sm.azurewebsites.net).
If you bought the domain from azure, you can follow the steps below.
1.Click the domain name under App Service Domains part. You will be redirected to the management page.
2.Click 'Manage DNS records'
3.click 'Record set' to add a CNAME record.
If you bought the domain from other platform, you need to go to their domain management page to configure this, the steps are similar.