not able to add domain from admin center

Question

not able to add domain from admin center

Praveen Nair 5

Not able to verify domain (TXT record not able add ) the domain already exist, we have no credentials for old tenant. Kindly help

Praveen Nair 5 Reputation points

2026-03-16T08:47:04.59+00:00

We have confirmed that you own supertechmiddleeast.com, but we can't add it to your account because the domain is already added to a different Microsoft 365 organization: orrointeriorscom.onmicrosoft.com. Sign in to the admin center as an admin for that organization, and remove the domain supertechmiddleeast.com. Try resetting the admin password if you can't sign in. You should be able to add the domain supertechmiddleeast.com here after taking that step. If you can't access orrointeriorscom.onmicrosoft.com, please contact our support team for help.

This is the error
Praveen Nair 5 Reputation points

2026-03-16T08:48:43.06+00:00

I need technical support from microsoft team
VEMULA SRISAI 13,985 Reputation points Microsoft External Staff Moderator

2026-03-18T13:30:30.7633333+00:00

Praveen Nair If your custom domain has already been verified in another Entra directory. You can do this by entering your domain name in the following URL to retrieve the tenant ID where it is verified:

https://www.whatismytenantid.com/

Once you have the tenant ID, verify whether it belongs to your tenant. If the tenant ID is different and you do not own that directory, the only option is to contact the Data Protection team via a support ticket to request the removal of the domain verification from the existing Entra ID tenant. After the removal, you should be able to verify the domain in your tenant without any issues.

Once you send me these details via private message, we can connect offline to discuss further and assist you in resolving this issue
VEMULA SRISAI 13,985 Reputation points Microsoft External Staff Moderator

2026-03-19T10:38:11.92+00:00

Praveen Nair could you please share the requested details in private message.

1 answer

Your answer

Praveen Nair 5 Reputation points

2026-03-16T08:47:04.59+00:00

We have confirmed that you own supertechmiddleeast.com, but we can't add it to your account because the domain is already added to a different Microsoft 365 organization: orrointeriorscom.onmicrosoft.com. Sign in to the admin center as an admin for that organization, and remove the domain supertechmiddleeast.com. Try resetting the admin password if you can't sign in. You should be able to add the domain supertechmiddleeast.com here after taking that step. If you can't access orrointeriorscom.onmicrosoft.com, please contact our support team for help.

This is the error
Praveen Nair 5 Reputation points

2026-03-16T08:48:43.06+00:00

I need technical support from microsoft team
VEMULA SRISAI 13,985 Reputation points Microsoft External Staff Moderator

2026-03-18T13:30:30.7633333+00:00

Praveen Nair If your custom domain has already been verified in another Entra directory. You can do this by entering your domain name in the following URL to retrieve the tenant ID where it is verified:

https://www.whatismytenantid.com/

Once you have the tenant ID, verify whether it belongs to your tenant. If the tenant ID is different and you do not own that directory, the only option is to contact the Data Protection team via a support ticket to request the removal of the domain verification from the existing Entra ID tenant. After the removal, you should be able to verify the domain in your tenant without any issues.

Once you send me these details via private message, we can connect offline to discuss further and assist you in resolving this issue
VEMULA SRISAI 13,985 Reputation points Microsoft External Staff Moderator

2026-03-19T10:38:11.92+00:00

Praveen Nair could you please share the requested details in private message.

Answer 1

The domain is already verified in another Microsoft 365/Entra tenant. A custom domain can only exist in one tenant at a time, so it cannot be added or verified again until it is removed from the old tenant.

Because there are no credentials for the old tenant, self-service removal is not possible. The only supported options are:

If anyone in the organization might still have admin access to the old tenant
- An admin of that tenant must sign in to the Microsoft 365 or Entra admin center and remove the custom domain from that tenant.
- After the domain is removed there, it can be added and verified in the new tenant.
If no one has access or the tenant is unknown
- This is treated as a “domain exists in another organization” / “unknown tenant” case.
- Contact Microsoft support and request help to move or release the domain from the unknown tenant. Be prepared to prove domain ownership (for example, by adding DNS records that support asks for).

Key points from the documented behavior:

Error messages such as “<DomainName> has already been verified for your account, or for another Microsoft Online Services account” or “Can't verify the domain <DomainName> was already added to a different Office 365 account … remove domain <DomainName> and then try again” indicate the domain is in another tenant and must be removed there first.
If the old tenant cannot be accessed and its details are unknown, only Microsoft support can assist after validating ownership.

Until the domain is removed from the old tenant (by an admin of that tenant or via Microsoft support after verification), it will not be possible to add and verify the TXT record for that domain in the new Entra ID tenant.

References: