You can sign in here to remove old device and add the new one.
https://mysignins.microsoft.com/security-info
--please don't forget to upvote
and Accept as answer
if the reply is helpful--
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When I try and change my phone number for authentication it requires me to send a code to my previous number that is no longer active. What do I do?
You can sign in here to remove old device and add the new one.
https://mysignins.microsoft.com/security-info
--please don't forget to upvote
and Accept as answer
if the reply is helpful--
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