1. Login to the O365 Admin Panel.
Office 365 Admin Login URL: https://portal.office.com/
2. Click on the gear sign mentioned on the left hand side menu and click on Security & Privacy.
3. Now click on the Edit option as shown on the figure below.
4. Now enable the slider of Set user passwords to never expire and click on the Save.
Article ID: 1171
Last updated: 28 Feb, 2019