F5 APM SAML SSO

I have one query as follows - I have webtop where user are getting authenticating using saml then we are giving login page - variable assign and outlook resource this is working perfectly fine when user clicks on outlook resource it redirects to outlook and doesnt ask any username or password

Webvpn.com > SAML ( Azure Auth) > APM Login page > variable assign mapping > sso > adv resource assignment

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Now customer want to eliminate second login page from the F5 , as per requirement once user authenticated via azure saml it needs to be directly present resources such as outlook and once user clicks on the outlook resouce it should not ask username and password now question is how we can use sso in this scenario as there is no option for the password attribute from saml