While using my Azure DevOps account i receive the following error.
You can’t sign up because login ‘my account’ is already used by an existing user.
It once worked, however I left the company and returned a couple months later. My new account (same email) can’t be mapped.

Screenshot error message.
Still unable to login with my CORP account 
Hello @mvdende82,
I took some action on my end, can you please try again and let me know if there are any issues?
Regards,
Justin
It’s working, thanks! Only thing i’ve noticed is the mailadres; currently m.vd.ende@minvws.n instead of m.vd.ende@minvws.nl. Is that by purpose?
Hello @mvdende82,
We retrieve this value from the Microsoft API and store it on our side.
Regards,
Justin