Forum Discussion

Iron Contributor

Oct 03, 2018

Outlook <-> Exchange Protocols

During Ignite I saw a presentation that suggested Outlook was moving to a new communication protocol "Hx" from the current REST API method (Mobile) and MAPI/HTTP (Desktop) I was surprised to hear th...

MVP

Nov 06, 2018

So apparently that's the protocol the win mobile app used, and will now be used by all non-desktop apps. Transition should happen by end of year, it's transparent to the end users. One of the benefits is that it eliminates the additional proxy service currently running in Azure.

Some additional details here: https://youtu.be/dt5GomXuqhI?t=325

Adrian Hyde
Iron Contributor
Nov 12, 2018
It would be nice to have some technical details of the new protocol - similar to what we saw when we transitioned from RPC -> MAPI. Especially since they say we'll all be transitioned by year end! There are all kinds of network appliances that may need to be tweaked for the new protocols.
- VasilMichev
  MVP
  Nov 15, 2018
  Well, it just appeared on the Roadmap... with tons of additional information :)
  
  https://www.microsoft.com/bg-bg/microsoft-365/roadmap?filters=&searchterms=43970
  - VasilMichev
    MVP
    Nov 15, 2018
    But the documentation (and the FAQ) have been updated with actual details:
    
    https://docs.microsoft.com/en-us/exchange/clients-and-mobile-in-exchange-online/outlook-for-ios-and-android/outlook-for-ios-and-android
    
    I've asked them to clarify on the questions asked in this thread as well.