How Often Will I Be Prompted to Login to Office 365
How often Office 365 will prompt you to authenticate on Office 365 applications or Outlook on the Web.
This article applies to: Two-Step Login
Office 365 Applications and Mobile Apps
For Office 365 applications installed on your computer, phone, or tablet, and for current versions of Apple's Mail and Calendar applications in iOS and macOS, you will be prompted to authenticate with Two-Step Login about every 60 to 90 days.
Outlook on the Web (outlook.cornell.edu)
For Outlook on the Web and other Office online applications, if you select Stay Signed In, you will be prompted about every 30 days. If you change to a different browser or device, you will be asked to authenticate.
Two-Step Login for Office 365
Two-Step Login for Office 365 will not change how often you are prompted to authenticate into Office 365.