Using Outlook for iOS for personal email and calendar management
I’m sorry your mum is experiencing this issue.
As the account was blocked after several incorrect password attempts, please stop trying to sign in or request verification codes for at least 24 hours. After that, use the Microsoft Sign-in Helper from the old phone or another familiar device and network.
Please do not sign out, remove the account, uninstall Outlook, or reset the old phone while the mailbox is still accessible there.
Also check the Inbox, Junk, and Spam folders of the contact email address entered on the recovery form. If no result was received, submit the account recovery form again with additional details, such as previous passwords, exact email subject lines, frequent contacts, and connected Microsoft services. Microsoft normally responds within 24 hours, and the form can be submitted up to twice per day. Help with the Microsoft account recovery form
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