I often get asked about our customer that is there any way to stop user’s password getting expire on a regular basis in Office 365.We reccomend that not to chnage that setting as it will relax the security settings and complaince.
As an admin user we can make user’s passwords expire after a certain number of days or set the password to never expire. It is also possible to change the number of days before users are notified of password expiration.
This applies to Office 365 Enterprise, Office 365 Business Essentials or Office 365 Business Premium.
Sign in to Office 365 with your work or school account.
Go to the Office 365 admin center.
In the admin center preview, go to Settings > Security and privacy and click Edit.
In the admin center, go to Service settings and then Passwords.
If you don’t want users to have to change passwords, select Passwords never expire. If you select this option, users won’t get any reminders anymore to change their passwords.
If you want user passwords to expire, type the number of days before the password should expire. Choose a number of days from 14 to 730.
Type the number of days before users are notified that their password will expire, and then click Save. Choose a number of days from 1 to 30.