Hi @Khizer Hayat • Thank you for reaching out.
I understand that custom domain validation is failing despite you having set the necessary TXT record.
Are you able to share the domain name, I will also ping you a private message in case you do not want to share the domain on a public visible and indexable page for privacy reasons, this would help in working out where the problem exists.
Usually it's either a mismatch or typo on the DNS record which can be validated with the following command, by replacing microsoft.com for your own domain.
Resolve-DnsName -name microsoft.com -Type TXT
You can also check that no mistake indeed was made for using it in a different Azure account by calling the common OIDC endpoint in a browser of your choice:
https://login.microsoftonline.com/yourdomainhere.com/.well-known/openid-configuration
If the domain is not validated in our systems in any tenant then it should produce an output similar to the one below.