Windows 10: My MS account sign in ended up on a domain

I tried adding my old email address in settings & it adds it & I verified it but it says it cannot be made my default account because it's on a domain. I just created this hotmail account on the Internet on my home laptop. It used to be my sign in. How did it end up on a domain? I found it in Powershell with the /Domain command. Can these be taken off the domain and/or deleted? I also tried signing out of the local account & adding that MS account using my old email. On a side note my husband has two user accounts under C:/users. When I check for net users in Powershell only one of them shows up. Should I delete one of them & which one? One of his shows up on a domain too.

:)

 

How do I protect my local account

My organization is testing Windows 10. Our setup contains a domain server for account access. So we will be needing to setup the OS using the "sign in without a Microsoft account" option during setup to put in our local admin account. Then we attach the
PC to our domain. And from there we start adding the domain users to the PC as they need.

So it seems that there are 1 1/2 bazillion ways to "sign in" to Microsoft account in different ways. For example, I signed into the email app (which works surprisingly well) with my domain email account and I also signed into my Onedrive. I tried not to
tie my computer into Microsoft accounts completely, so I still sign into my account using my domain ID. But when I go to the app store, my Microsoft account can sign into the store and I can download apps. Why? Edge is also signed into my Microsoft account.

It just seems very confusing as to how these accounts work. So Here's my fear, if I deploy this computer to someone's desk who happens to have a MS account and they hit the "wrong" button and sign in, I'm afraid it will suddenly change their account to
a full fledged MS account so that the next time they sign in, it will require their MS credentials rather than the domain credentials. While I'm sure there is a "really easy" way to undo this, I don't want to be running around my office putting out MS account
"fires" everywhere.

So here are my questions. #1, what are all of the specific places (including office) that you can sign into a MS account and how will that specific sign in effect the OS? (example, if you go to the onedrive app and sign in, that will also enable your sign
in for the app store) perhaps... something like that. And #2, is there a way to "protect" the domain login and also keep people out of the app store? I would like to disable certain MS account functions so that the PC doesn't inadvertently become a MS wonderland
of synchronization where syncing isn't needed. Thank you.

PS, as I navigated to this page, I never had to enter my username/password. It knew who I was... why? All I did was sign into Onedrive and sync my email!

 

Can't link PC to MS account

So here's the background. I'm running Windows 10 on my PC and have it connected to a domain. Due to some extraneous problems I ended up having to completely rebuild my domain controller, therefore losing all the old accounts. So now I have re-connected
this PC to the domain, but when I try to link it to my MS account it says another user on this PC is already using that account. I have deleted the old profiles from this PC and I also went to my MS account settings and removed this PC from devices. I still
get the same error. Any ideas?