Microsoft prioritizes account security and works to prevent people from signing in without your permission. When we notice a sign-in attempt from a new location or device, we help protect the account by sending you an email message and an SMS alert. If your phone number or email changes, it's important to promptly update the security contact info on the Security basics page so we can work with ...

Using Authenticator as a way to sign in If you have turned on passwordless, two-step, or multi-factor authentication for your account, use the following steps to sign-in: Go to the site where you want to sign in. Enter your username at the sign-in prompt and select Next. Select Send notification.

About digital signatures and certificates in Office, and buying a digital certificate from a certificate authority or create your own.

If your organization is using multi-factor authentication (MFA) for Microsoft 365, the easiest verification method to use is the Microsoft Authenticator smart phone app. It's just one click instead of typing in a 6-digit code. And if you travel, you won't incur roaming fees when you use it. Download and install Microsoft Authenticator app Download and install the Microsoft Authenticator app ...

These steps are the same whether you're adding your first iCloud email account or additional iCloud accounts to Outlook. Select a tab option below for the version of Outlook you're using. What version of Outlook do I have?

Here are the most likely causes for an unrecognized charge: A Microsoft subscription has recurring billing enabled. Someone you know, such as a family member, bought something with your card. You can now investigate this on the Manage your payments page. A previously declined charge was charged again. A pre-order or split order was shipped. Someone made an in-app purchase from an app, game, or ...

Learn how to sign in and create app passwords for Microsoft apps and devices that don't support two-step verification.

Get quick answers to your questions with Microsoft 365 Copilot Chat. Your AI assistant for work can find information in files and messages effortlessly.

Learn how to manage your Microsoft account security info and troubleshoot verification code issues.

Classic Outlook error when sending from Outlook.com "You do not have permission to send on behalf of the specified user."