XFA can be used as a factor through the BYO MFA functionality in OneLogin. This allows XFA to be seamlessly added to any application from within the OneLogin admin dashboard, given that it uses OneLogin as the identity provider.
When a user authenticates with OneLogin, as an additional factor after supplying a username & password, the user is redirected to XFA to verify that the device is compliant with the device security policy before authenticating the user. This assures that only devices that comply with the security policy are allowed access.