My mother, Peggy, the administrator to this account passed away. I need to be added as the administrator to this account.

I am 71 years old and need to be added as administrator

How do I add myself as administrator?

I am sorry for your loss, please provide more information on your requirements.

What do you need to become administrator of, is that your mother's Outlook account or a Microsoft 365 Family account, or is it something else.

If that is just an Outlook account, are you able to access that account, do you know the associated password.