Sign-in : Can't Sign-in (General)
If you can't sign-in to your Microsoft e-mail account (for instance, you forgot your password), go to "When you can't sign in to your Microsoft account" for troubleshooting suggestions -
https://support.microsoft.com/en-au/help/12429/microsoft-account-cant-sign-in
If you apply to change your password, Microsoft will not make the change you request for one month. In the meanwhile they will notify the account owner, by e-mail, and give him one month to object to the change (in case you are attempting to hijack someone else's e-mail account). You won't object, because you won't receive their e-mail, as you are locked out of the account.
After the one month delay, you can use the new password you've nominated to sign-in to your e-mail account.
If you can’t reset your password, or an attacker changed your account settings, the recovery form at "Recover your Microsoft account" gives you a chance to prove that you own the account (this account recovery form is meant to be the last option to get you back into your account) -
https://support.microsoft.com/en-us/help/17875/microsoft-account-recover
If your account was deleted, there is additional advice here: