Office 365 Compatibility Changes

Posted by Shaun Kamps

Sep 14, 2017 9:29:53 AM


Outlook 2007 desktop email client application will not be able to connect to the Office 365 Exchange mailboxes.



On October 31st, 2017 there will be a change to how authentication functions between the Office 365 Exchange Online and your local machine’s Outlook program.



The change is sparked by the ever changing security landscape in an effort to provide a more robust authentication process via elective 3rd party solutions.


Who will this affect?:

This change will adversely affect any user or organization that is using Outlook 2007 as the Outlook 2007 program will not be able to connect to the Office 365 Exchange mailboxes. If you or your organization are using new versions of Outlook, below is a breakdown of what Updates need to be installed to ensure your connectivity remains intact:

Office 2016 December 8, 2015

Subscription: 16.0.6568.20xx   MSI: 16.0.4312.1001

Office 2013 Service Pack 1, and December 8, 2015 update 15.0.4779.1002
Office 2010 Service Pack 2, and December 8, 2015 update 14.0.7164.5002


Unsure if this affects you?

The best way to avoid issues regarding this compatibility change is to have your on-site technician or your trusted outsourced IT partner review your system. This will ensure you and your team have a positive experience as this change is implemented.

Topics: Email, Office 365, Outlook, Exchange Online

Most Popular Posts


* indicates required

Posts by Topic

see all