Disclaimer: This news item was originally posted on Tuesday, Oct 17, 2017. Its content may no longer be timely or accurate.

October 31, 2017 - Microsoft ends support for RPC over HTTP protocol

Posted: 15:45:29, Tuesday, Oct 17, 2017   Expiration: 15:45:29, Friday, Nov 10, 2017

Microsoft is ending support for the RPC over HTTP protocol beginning October 31, 2017.

Beginning October 31, 2017, Outlook for Windows clients using RPC over HTTP will be unable to access their Exchange Online mailbox. Exchange Online mailboxes in Office 365 will require connections from Outlook for Windows using MAPI over HTTP.

https://support.microsoft.com/kb/3201590/en-us
  • Outlook 2007 does not contain support for the MAPI over HTTP protocol. Individuals using Outlook 2007 should upgrade to the newest version of Microsoft Outlook.
  • Outlook 2010-2016 customers will need to ensure their version of Outlook for Windows is set up to support MAPI over HTTP. At a minimum, customers should ensure they have installed the December 2015 update.
  • Lastly, customers should ensure Outlook clients are not using a registry key to block MAPI over HTTP.
If you have any questions, please contact the DoIT Help Desk.

-- Office 365: Tamara Walker

Created: 05:53:45, Tuesday, Oct 17, 2017 (by Tamara W.)
Updated: 09:17:05, Wednesday, Oct 18, 2017 (by Christina G.)