Microsoft Changing How Outlook Connects To Office 365

Microsoft recently announced an upcoming change to their Office 365 (Exchange Online) service that could result in some Outlook users not being able to connect to their mailboxes.

We want to make sure our partners around the world are aware of this so that you can prepare yourselves and your customers.

Overview:

The changes will affect all Outlook users who are not using a 2016 version to connect to an Office 365 mailbox.  The announcement states that the protocol previously used by Outlook 2007, 2010, and 2013 to connect with Office 365 (RPC over HTTP aka Outlook Anywhere) will no longer be supported by Office 365 after October 31, 2017.  Once the changes have been rolled out to Office 365 servers, Outlook will not be able to connect unless it has the required updates to support MAPI-over-HTTP. 

Microsoft support article – RPC over HTTP deprecated in Office 365 on October 31, 2017 

However, this Microsoft update will impact many of customers who are using Office 365, as well as customers who be migrating in the months ahead.

What this change means for…

Outlook 2007 users

Users of Outlook 2007 will not be able to connect to Office 365 beyond October 31. They will therefore need to upgrade to a newer version of Outlook.

Outlook 2010 users

Outlook 2010 will only be able to connect to Office 365 beyond October 31 if updates have been installed to meet or exceed build number 14.0.7164.5002.

Also important, Microsoft mainstream support for Outlook 2010 has expired.

Outlook 2013 users

Outlook 2013 will only be able to connect to Office 365 beyond October 31 if updates have been installed to meet or exceed build number 15.0.4779.1002.

For customers requiring assistance or clarification of what this means for your company, please contact our cloud experts at (403) 26-5238 or via email at support@globaledgesys.com.

Article from SkyKick Blog, written by Bern Clark August 21, 2017