Windows 10: Windows Account versus Office 365 Account

My mother-in-law purchased Microsoft 365 Family a few years ago and my wife and I are one of the members of her shared subscription. Question I have is when we launch let's say Excel I see my Microsoft account. When I launch Settings, it shows my mother-in-law's name and account instead. When I click on Accounts under Settings, and then Your Info, I see my Microsoft account. So, I was hoping to either understand when I see my mother-in-law's name under Settings if that is a Windows account or the Office 365 account. The PC is older, and when I originally installed Windows, we did not have

:)

 

Office 365 Outlook email accounts

The reason I am asking these questions are that two individuals are buying two new laptops and would like to share one Microsoft Office 365 Personal.
A has a subscription to Microsoft Office 365 Personal already and wants to share the same account with B.
I have installed Microsoft Office 365 Personal in a second pc B and when launching Outlook all my email accounts from A were loaded. So, I cannot figure out how to install Microsoft Office 365 Personal in a second pc so that my email accounts A are not loaded.
This raises more questions for me.

1. So this
   • User A installs and activates O365 on User B's laptop
   • User B adds his / her email accounts to Outlook
   would not apply to Microsoft Office 365 Personal as it breaches the licence agreement?
2. Am I correct?
3. If it does apply how can I install Microsoft Office 365 Personal in a second pc so that my email accounts A are not loaded, and I can only add B email account on the second pc?
4. Would B be able to access A OneDrive?
5. Or would B have a separate 1TB free space in One drive, or only the free 5GB or none at all?
6. And most importantly is this even legal or in breach of contract as Microsoft Office 365 Personal is for one user only?

 

Move files from Onedrive account to Office 365 account

Background

1. I have a Onedrive account linked to my Microsoft account that I use
   to back-up my personal files.
   
2. I now have separately been granted an Office 365 account, which comes
   with unlimited storage.
   

Issue

As I am paying a fee (albeit small) to extend the size of the
Onedrive capacity linked to my Microsoft account, I am keen to move
some files between the two systems. The files I am looking to move
exist only online.

A number of tools offer functionality to handle files between cloud accounts, ie

• MultCloud
  
• Rainbow drive (Microsoft Store)
  

Howvever both these options do not recognise attempts to connect to the Office 365 Account (they work with Microsoft Accounts only).

Question

Is there a way to move the files without a two-stage download (to pc), then upload (to Office 365)?

 

Office 365 Outlook email accounts

O365 Personal cannot be shared. It can be installed on unlimited number of devices, but it must be activated with the same subscriber Microsoft account on each device.

Extract from Office 365 subscriptions - On how many devices can Office be installed:

However, the activation Microsoft account email does not have to be added to Outlook. A fully valid and functional example:

• User A subscribes to O365 Personal
• User A installs and activates O365 on his / her laptop
• User A adds his / her email accounts to Outlook
• User A installs and activates O365 on User B's laptop
• User B adds his / her email accounts to Outlook

The point is, that the O365 Personal subscriber email is required to activate Office on each device, but it don't have to be added to Outlook. In above example, both User A and User B add only their own email accounts to Outlook, and cannot see each other's accounts and emails.

Exactly.