"Another DNS record already exists with this host name" when adding an Address or CNAME record
Office 365 ProPlus is being renamed to Microsoft 365 Apps for enterprise. For more information about this change, read this blog post.
In Office 365 Small Business, you try to add an Address (A) record or a CNAME record in the Office 365 portal. However, you get the following error message:
Another DNS record already exists with this host name. Type a different name.
To add a record other than a www record, use a different host name, or update the existing record.
This issue occurs if the DNS record already exists.
Still need help? Go to Microsoft Community.