The new Security tab under your Company Settings is where you can control all aspects of User logins, Single Sign On, and blocked numbers.
You can access the Security tab by going to Admin (1) > Company Settings (2).
Next click on the Security Tab (1).
The Password Policy (1) settings allow you to customize password expiry and account lockout prerequisites.
Complexity Requirement (2) give you the ability to require your Users to have passwords to varying complexity. You are able to require lax, or strict passwords, depending on the settings chosen here.
Once all settings are configured to meet your company’s security requirements, click the green ‘Save Changes‘ button (3) in the top right corner of the page.