Update: Hotfix KB2899591 pulled in Dec2014 due to possible issues, replaced in Jan2015 by KB878264.

A quick heads-up today as the recently released KB878264 hotfix adds MAPI/http support for Outlook 2010 clients. This will benefit organizations using Exchange 2013 SP1 or later considering switching from RPC/http to MAPI/http. The KB article includes details on additional fixes that are included in this hotfix as well.

You can request the hotfix for x86 and x64 versions of Outlook 2010 here.

Links to background information on MAPI/http, its impact on client performance, and impact on network traffic in an earlier blog post here.