Microsoft Entra ID
A Microsoft Entra identity service that provides identity management and access control capabilities. Replaces Azure Active Directory.
20,630 questions
Unable to add sub domain to custom domain
![](data:image/svg+xml, %3Csvg xmlns='http://www.w3.org/2000/svg' height='64' class='font-weight-bold' style='font: 600 30.11764705882353px "SegoeUI", Arial' width='64'%3E%3Ccircle fill='hsl(156.8, 10%, 25%)' cx='32' cy='32' r='32' /%3E%3Ctext x='50%25' y='55%25' dominant-baseline='middle' text-anchor='middle' fill='%23FFF' %3EPZ%3C/text%3E%3C/svg%3E)
Paul Zanbaka
6
Reputation points
I am trying to add sub domain to custom domain in Azure AD
example: ad.acme.com as custom domain in acme.com
I receive this error
failed to add domain
Unknown
{count} votes
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![](data:image/svg+xml, %3Csvg xmlns='http://www.w3.org/2000/svg' height='64' class='font-weight-bold' style='font: 600 30.11764705882353px "SegoeUI", Arial' width='64'%3E%3Ccircle fill='hsl(9.6, 15%, 10%)' cx='32' cy='32' r='32' /%3E%3Ctext x='50%25' y='55%25' dominant-baseline='middle' text-anchor='middle' fill='%23FFF' %3ESM%3C/text%3E%3C/svg%3E)
singhh-msft 2,431 Reputation points2021-05-20T18:13:49.91+00:00 @Paul Zanbaka , thank you for reaching out to us.
If you want to add a subdomain name
ad.acme.comto your organization, you should first add and verify the root domain,acme.com. The subdomain is automatically verified by Azure AD. To see that the subdomain you added is verified, refresh the domain list in the browser.If you have already added a
acme.comdomain to one Azure AD organization, you can also verify the subdomainad.acme.comin a different Azure AD organization. When adding the subdomain, you are prompted to add a TXT record in the DNS hosting provider.Check out Add subdomains of a custom domain for further details.
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![](data:image/svg+xml, %3Csvg xmlns='http://www.w3.org/2000/svg' height='64' class='font-weight-bold' style='font: 600 30.11764705882353px "SegoeUI", Arial' width='64'%3E%3Ccircle fill='hsl(268.8, 3%, 36%)' cx='32' cy='32' r='32' /%3E%3Ctext x='50%25' y='55%25' dominant-baseline='middle' text-anchor='middle' fill='%23FFF' %3EMW%3C/text%3E%3C/svg%3E)
Mario Worwell 11 Reputation points2021-05-20T19:35:37.907+00:00 This was going to be my suggestion as well. Add and verify the root domain from the Registrar, then the subdomains should be added easily.
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singhh-msft 2,431 Reputation points
2021-05-21T06:09:59.677+00:00 @Paul Zanbaka , just checking in to see if you got a chance to check my response.
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singhh-msft 2,431 Reputation points
2021-05-21T16:31:55.143+00:00 @Paul Zanbaka , if this does not work, can you run below commands and let me know the result? :
Connect-MsolService New-MsolDomain -Name ad.acme.com -TenantId <Tenant_ID>Let me know if this helps you.
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singhh-msft 2,431 Reputation points
2021-05-24T04:17:31.387+00:00 @Paul Zanbaka , just checking in to see if you got a chance to check my response.
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singhh-msft 2,431 Reputation points
2021-05-25T05:05:53.07+00:00 @Paul Zanbaka , just checking in to see if you got a chance to check my response.
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