Disable users from changing password in Office 365

Question

I want to take away the ability for users to change their email password in Office 365. How can I achieve this? I would at least like to create a password policy requirement.

Answer 1

You cannot prevent users from changing their own passwords in Office 365/Azure AD. As for enforcing policy requirements, refer to this article: https://learn.microsoft.com/en-us/microsoft-365/admin/manage/set-password-expiration-policy?view=o365-worldwide
Apart from that, you can also configure a "banned password" list: https://learn.microsoft.com/en-us/azure/active-directory/authentication/tutorial-configure-custom-password-protection
If you want to exert more control over the process, consider configuring redirecting your auth process to on-premises and/or implementing the password writeback feature, which in turn allows you to enforce the on-premises AD password policies: https://learn.microsoft.com/en-us/azure/active-directory/authentication/tutorial-enable-sspr-writeback