Their help admittedly is professional-tier centric and suggests that if you can edit your DNS record to add the "I own this" file they give you, you can use any domain. Do they explicitly not support this for the family edition? I guess I'll have to test it with a free month and a spare domain.

The FAQ explicitly answers this question:

> Q: I already own a domain that's registered with a provider other than GoDaddy. Can I set up a personalized email address in Outlook.com? > > A: At the moment, we only support connecting domains managed by GoDaddy with Outlook.com.

There’s not a lot of room for workarounds here. If you read some help, be extra careful it’s not for Microsoft 365 business, which offers a lot more freedom. For a price.

I've just moved a small business (25-50 users) off of GoDaddy 365.

Every horror story about other GoDaddy products is equally applicable to their 365 offering.

Their support takes hours to get to, and has hung up on us multiple times when the problem is anything but wanting to purchase more services, putting you back at step 1.

They force you into their own god awful auth instead of Microsofts usual OAuth and it breaks so many things, making you sign in constantly and you can't even use 2FA.

For anyone reading this, never use GoDaddy 365, I am so glad to be free of it.