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, select the Account icon (this may display as your profile image), and then select Profile.
- On the Profile page, select Sign Out Everywhere.
- Select 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.