Password Expiration is a method that is used when an organization wants their employees to change their passwords after some regular intervals like after 60-90 days etc.
How to Enable Password Expiration Policies in Office 365
Just follow the steps mentioned in the Video Guide to Enable Password protection in Office 365
Why Password Expiration Policy is used
#. Previously it was assumed that it would take around 60-90 days for a computer to crack the average password hash.
#. If an average password can be hacked in 90 days so we should make a habit of changing the passwords after before 90 days.
#. But Now a days password expiration are not much used because Multi Factor Authentication is there to add extra security to your office 365 account. Watch the video and Learn How to Set Password Expiration Policy