If you wish to have your employees updating their passwords periodically, you can set a global password expiry period.
This forces all users to reset their password at specified intervals, e.g. every 90 days.
To set or change this at a company level:
1. Go to the Setup drop down menu.
2. Click Company.
3. Select General Preferences.
4. Enter a value in the Password Expiration in Days field.
5. Click Save.