My son downloaded Roblox through gamepass on the Xbox, I'm now trying to access his account...

What exactly are you trying to do?

Did your son lose access to something through Roblox? and you are trying to get him access back to it?

If your son is playing on the xbox one under his own profile then his account should have an email attached to it.

If the games were purchased under your account even if they were free you can see if the roblox customer support will allow you to send them a screenshot of your order history.

Roblox is not a game pass title, it is a free to play game, but not part of the game pass program

I'm sorry but his Roblox account is managed by Roblox and not Microsoft. His Microsoft account is an entirely separate thing. Is it the Microsoft account that you can't log into or the Roblox account?

Thank you for trying to help but this does not apply to my situation. There is no email address or phone # attached to the Roblox screen name. I need help finding where to prove the Roblox account is my sons through Xbox so that Roblox support can assist with a password reset.

I have looked everywhere through the history downloads and it is nowhere to be found micro soft did help me find one which was his old account but i am looking for one which was downloaded in march 2019 .i did verify his email but roblox said they need
the purchase receipt but the download was free .ANY IDEAS PLEASE HELP .This is not the first time that roblox has done this to my sons account .That is why we downloaded a new game in march 2019

Same thing happened to my son and some of his friends this week. The guy offered to let them download his profile onto their Xboxes so that they can download Watch Dogs for free. They all fell for it, unfortunately my debit card is attached to my son's
account and the guy charged over $60 on my account, changed my sons Gamertag and associated email address, so now my son has no access to his own account.