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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...

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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.

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.
- VasilMichev
  MVP
  Nov 15, 2018
  Here's a link to the FAQ as well: https://docs.microsoft.com/en-us/exchange/clients-and-mobile-in-exchange-online/outlook-for-ios-and-android/outlook-for-ios-and-android-faq#native-microsoft-sync-technology-migration
  - Adrian Hyde
    Iron Contributor
    Nov 28, 2018
    This is good info VasilMichev - can you ping your contacts once more and see if they have an answer on if/when Outlook for Desktop is planning to also adopt this approach - or if it plans to remain on its own protocol stack. (and if so, why)
    I also noticed that one of the docs says Outlook for Mac is also going to align to this protocol, but there is nothing in the FAQ's explaining the transition like we see with the mobile Outlook clients.

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