insert http header IV_USER

Thanks Stanislas Piron, it worked for me, I have a requirement for this to be working as SSO for end-users so when they are on domain they don't need to login, currently I have a per session policy setup with a Logon page along with AD Auth/SSO credential mapping, problem is user still need to manually login with via Logon page, I'm trying to move to SAML (using F5 as SP and Azure AD as IDP) in order to provide better SSO user experience . I'm wondering per-request policy I've been using would be still valid in this scenario as well.