I am unable to log in to my account

For a personal Microsoft account such as Outlook.com, start with the Sign-in Helper because it checks the account and guides the correct recovery path: Sign-in Helper

If the reset flow is asking for verification codes but the OTP is not arriving to the registered phone number, use these supported steps:

1. Avoid excessive or repeated code requests. Repeated requests can trigger a temporary block where codes are not sent.
2. Check whether SMS delivery may be limited in the region. Microsoft notes that in some regions, SMS services can have limited functionality or temporary unavailability.
3. If the account also offers email verification, check the junk folder and look for messages from @accountprotection.microsoft.com.
4. If the phone blocks texts from unknown numbers, change that setting and request the code again.
5. If the phone inbox is full or the messaging app is malfunctioning, clear storage or troubleshoot the messaging app.
6. If the listed phone is a VOIP number, replace it with a mobile number when access is restored, because VOIP numbers cannot be used to sign in or receive verification codes.

If the password is correct but sign-in still fails, or the reset flow does not work, use: Recover your account

If recovery options are not recognized and two-step verification is not turned on, use the Sign-in Helper.

If two-step verification is turned on and there is no access to any alternate verification method, support cannot send password reset links or change account details.

If recovery by normal methods still fails, complete the Account recovery form from a device and location previously used for that account if possible: Account recovery form

Before submitting that form, prepare a working email address that can receive Microsoft’s response.

References:

• I can't sign in to my Microsoft account
• Help with the Microsoft account recovery form
• My username and password have stopped working
• Common problems with two-step verification for a work or school account