Creating a subdomain in O365

[headmaster]

Hi,

Is there any way of creating a subdomain in O365 with an already existing domain?

Example: webshop.contorso.com where contorso.com is the main domain controlled by the NS pointers by Microsoft.

It seems that the only way is to move the domain outside O365 to a more advanced DNS server.

All threads that I checked says that you have to move the domain to an external DNS, but they are a bit old.

The DNS editor in admin center is very simple.  No other way of doing this?

Best Regards

Rob

[#2]

Hi @headmaster,

Is advised to use a DNS managed externally to have other options that are not available on DNS managed by Office 365, you can read more here https://docs.microsoft.com/en-us/office365/admin/setup/domains-faq?view=o365-worldwide

Best Regards,

Nuno Árias Silva 

[#3]

@Nuno Silva 

Thanks for answer.

But to change a domain to an external DNS provider is always a risky business with a risk for down-periods for both homepage, mail, SharePoint and Teams. I would not say that it is an easy thing to fix for a medium size company with important communication flow.

Regards

Rob

[#4]

Hi @headmaster,

If you prepare all DNS records on the destination DNS when you change the name servers on your registrar of your domain, you will not have any downtime.