Windows 10: How can I use my own business's email address as my primary alias?

I need to change my Microsoft account email from the email of my old business 25 years old, now defunct to the email of my newer business 10 years old but Microsoft says I cannot use my work email for my Microsoft account. But the old email was a work account! As a small business owner, all is work. So what gives? Take out an email account that I'll never use, just to get rid of a defunct email address? Why can't I use the address of my choosing?

:)

 

unable to make my email alias a primary - no primary link appears to the right of the alias

There is no primary link next to my email alias to allow me to make it a primary as noted in the instructions. Any ideas? I am using Windows 10 Pro (not available to click in the drop down)

• Under Account aliases, click/tap on the Make primary link to the right of an added email alias you want
  to be your primary alias.

Note: The email alias at the top of the list without a Make primary link is your current primary alias.

 

Issues with logging in using alias email address

I had two email addresses as primary and secondary alias for my account. My old laptop(Win 8.1, my main PC is currently using Win 10), which I wanted to log on used the secondary alias email (primary back when it was my only PC), but the password didn't work. I decided to remove the secondary alias email from my account, to make a separate account in an attempt to be able to log onto my old laptop, however after what I thought was creation of a new account. turns out the two account somehow got merged into one (there was no intention of doing so and i saw no such option to choose), now I'm logging in into the same account using two different emails and passwords, with the currently main email address is being listed on my account as sign in email, but the email I intended to use for another account, instead is listed as primary alias (which I never wanted) and it doesn't seem like I'm able to change it in any way.

I would like to have the current main account use the listed sign in email (k.****** Email address is removed for privacy ***) as primary (and the only) alias, and have currently listed primary alias email (k****** Email address is removed for privacy ***) to be solely used for signing in and a primary alias for a secondary account. I don't want an option of signing into either of these account with the use of the other's email/password. I hope I described my issue and desired solution clearly enough.

 

Microsoft Primary Alias & @xboxlivefamily.com Email Addresses.

I was trying to Redeem an Item from Microsoft Rewards when I realized it was going to be sent to my @xboxlivefamily.com email address. That address cannot receive emails, is this with all @xboxlivefamily.com addresses? And why can't they receive emails?
So, I decided to change the primary email (alias) and It wouldn't let me. It said, "Your organization's policies prevent you from changing your primary alias." I am not apart of any organization. What could it be? Family?