.well-known folder with file vertification

In order to do microsoft domain verification, i need to upload a json file to be served at https://<domain>/.well-known/microsoft-identity-association.json

Tough it turns out, . character can not be used for link "slugs".

It is possible to host this file on my domain in anyway? I do my DNS management on aws, but i don't know if i can route from DNS to another server by url path.

Hey,

I'm looking to see if something is possible with SquareSpace before we agree to migrate over. 

We work with several partners who insist on doing validations with a file on the root domain rather than the preferred TXT record validation on DNS. For this we have to put a file in a folder at the root of the website in a folder called /.well-known. The file for example would be called test.devicemenagement and it would contain a text string for validation. 

This would then enable various partners to validate us on www.domain.com/.well-known/test.devicemanagemant

To further confuse this we need to add in a MIME type or contact to make sure the file extension of *.devicemanagement is downloaded as a JSON file.

Does anyone have any ideas of this is possible with Squarespace?

Thanks

Michael