Windows 10 login account and Office 365 login

My apologies if this is trivial!

A user has an office 365 account for the desktop apps and has an office 365 business app for the desktop apps.. Email is managed by an outside company but trying to get them to move email to office 365 at some point.

He can go to and log in with

He is in a workgroup with 1 machine. His windows 7 machine with username "hisname" died.

On his new win 10 machine, I want to do things "right".  I thought that meant to use a microsoft account - his address since he's paying money to microsoft and that works at

But creating a user on that machine using that address, I get

'That Microsoft account doesn't exist'....

I can create that but it wants person's name, birthdate, etc.  Is that the route I need and want to take? Or since he can log into office 365, he should be good to go?  Or is there something else I need to do?

thank you
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Vasil Michev (MVP)Commented:
Microsoft account (MicrosoftID) is different from Office 365 account (OrgID). If you want the user to be able to login with his O365 credentials, you need to join the machine to Azure AD:

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BeGentleWithMe-INeedHelpAuthor Commented:
So computers on workgroup, would you suggest:

setting up microsoft account AND office 365 account?  But even then, the machine password is not going to stay in sync with office 365 password, right?

Azure AD - sounds like overkill for a small business / home user with 1 PC?  Is there a cost for Azure AD?

What would you do? As an MVP, you'd know better than me!
Vasil Michev (MVP)Commented:
There's nothing wrong with simply using the Windows 10 machine with an offline account, or using a Microsoft account. Joining Azure AD and being able to login with O365 account doesnt add many new features and can actually make some things less intuitive, plus there's hardly any reason to use it in a 1-man shop.
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JohnBusiness Consultant (Owner)Commented:
I have my own machine in my own workgroup and my Microsoft Windows Account is the same as my Office account with the same password and that has been like that for a long time.   This is Office Live and subscription, however, not a Office 365 Exchange account.   For one user you do not need Azure (at least from my point of view)
William MillerIT SpecialistCommented:
You also don't really need a Microsoft account for login. In fact, it would be better practice to use a local account as having a Microsoft account for authentication can cause unwanted headache down the road. For instance, if the user ever forgets the password and has to recover.. you have to turn to Microsoft. This can go smoothly or it can go indefinitely. Offline accounts are generally easier to manipulate on the whole and are just better for everyday use in that regard.
JohnBusiness Consultant (Owner)Commented:
I keep a record of passwords (and I know lots of users do not). That said, I find the Microsoft Account very good. My laptop is Microsoft and my Desktop is local. They both operate equally well.
BeGentleWithMe-INeedHelpAuthor Commented:
William - just yesterday I saw something (I forget the circumstances) where some screen was warning about a local user account and if you forget the password, you are SOL (thinking we know how to get around that : )

But I agree with your thinking!

So I created a user hisname on the PC, logged into with , installed office desktop apps and somewhere in there it asked if I wanted the machine to remember that account (the I said yes.  not sure what that did...  I keep thinking microsoft makes things way more complex than it needs to be.

Microsoft account is not office 365 account!? really?! In that screen for setting up user on the PC, it has that long row of things is part of microsoft account... but not o365!?
JohnBusiness Consultant (Owner)Commented:
If you use the same email and password, it is not complicated.  You may or may not use the "benefits"  I do not always use these. Overall the use of a Microsoft Account is completely transparent in daily use.  I switched my Laptop at the MVP Global Summit in November, 2016. No issues since.
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