What port do you have open between the ADFS proxies and AD servers? 09/23/2018 – by Mod_GuideK 0 What port do you have open between the ADFS proxies and AD servers? A. 389 B. 88 C. 443 D. 636 SHOW ANSWERSCorrect Answer: C Explanation/Reference: References: https://bloas.technet.microsoft.com/askds/2012/01/05/understandinQ-the-ad-fs-2-0-proxv/