FortiAuthenticator provides access management and single sign on.
Description This article describes in detail how to renew password for users that is expired on AD using FortiGate and FortiAuthenticator.
Scope FortiAuthenticator, FortiGate.



1) It is presumed that SSL-VPN authentication with FortiGate and FortiAuthenticator is working, for password renewal it is mandatory to use MSCHAPv2 on FortiGate and FortiAuthenticator. 


2) In order to renew the password, it is necessary that FortiAuthenticator should be able to join the domain and use LDAPS.


ldaps fac joined.png


To use LDAPS with FortiAuthenticator, follow this KB article:


For FortiAuthenticator to join on AD, follow the below KB article and make sure that 'Use Windows AD Domain Authentication' is enabled on the Radius Policy on FortiAuthenticator.


rad pol.png


From the AD side, set a user account to expired and select 'user must change the password' on the next logon.


From SSL-VPN web portal, try to log in with username/password.

It will be prompted that the password is expired, then select a new one.




After the password change, the user is going to authenticate, this can be verified from the debug logs on FortiAuthenticator, https://<fac-ip>/debug and download radius authentication with the button on the upper right.


In the debug logs, it is possible to see that the user password change is required. This is done by MSCHAPv2 through ntlm_auth helper and the password change will be successful.