Can I use a subdomain for Azure

[ukmercenary]

Example I already have a website which is hosted by https://www.ionos.co.uk/ and the DNS records are there default ones.  I have created a subdomain example test.example.co.uk

In Azure AD Manger to add a custom domain it says I need to edit the TXT DNS record on my host.

I have tried to do this but it has not worked. 

Is it even possible to have two different hosts DNS records for one domain? 

Cheers

Paul 

[#2]

Is this for an Application/Webapp?

You need to add the Custom Domain, in your App, not in Azure AD, or is this for Active Directory users and computers?

FYI: If your using Cloudflare (untick the orange Cloud to stop proxying)

[#3]

Have you followed this guide?
https://docs.microsoft.com/en-us/azure/dns/dns-delegate-domain-azure-dns

By the sounds of it, not yet pointed your domain to use Azure's DNS servers

[#4]

I have bought a separate domain which fixes the issue