Sign out of all devices
When working to secure a compromised Office 365 account, use the Sign Out Everywhere feature to sign out a user from all devices.
- Sign in to the Office 365 Profile page using your email address and password.
- In the upper right corner, click the Account icon, this may display as your profile image, and select Profile.
- On the Profile page, click Sign Out Everywhere.
- Click Yes to confirm you want to sign out of all sessions and all devices.
- Ensure that your account is secure by changing your Office 365 password.