Sorry for the confusion, but we are not sure what exactly you mean. When SAML SSO is enabled for a Web interface, Adaxes sign in page is not displayed for login to the Web interface. Instead, users directly get to the SAML identity provider page. If password change is requested after entering credentials of a user with expired password there, that is not something we can assist you with as it is not a part of Adaxes. However, the SAML identity provider support team might be able to help you with the corresponding settings.
If you face the below after entering credentials of a user with expired password, this behavior is be design and cannot be changed.