Office 365 – important changes for Outlook users in October

Outlook users of Office 365 need to use 2010 version or newer

Anyone connecting to the Office 365 email system using Microsoft Outlook needs to be aware of important changes that are taking place at the end of October 2017.

From 31st October, Microsoft are changing the protocols that allow connection between the Outlook email program and Exchange – moving to a more secure ‘MAPI over HTTP’. They state that they are doing this as MAPI is more efficient with data transfer and allows more secure authentication, compared to the previous method.

Unfortunately, Outlook 2007 (and earlier Outlook versions) do not work with this new protocol and Microsoft will not ‘upgrade’ them to make them compatible. This means that anyone using these versions of Outlook with Office 365 will no longer be able to access their emails after 31st October and will need to move to a more recent Outlook version, to continue to access their emails through Office 365.

Also, any newer versions of Outlook must be up to date with their regular updates, to ensure that they work correctly after the 31st October.

Here are the Office version numbers that are the minimum needed to keep the connections working after the changeover (information supplied by Microsoft as at 28.9.17):–

Office 2010 – 14.0.7164.5002
Office 2013 – 15.0.4779.1002
Office 2016 – Subscription: 16.0.6568.20xx or MSI: 16.0.4312.1001.

To check the version of Office 2010, open Outlook, go to Help > About Office Outlook.

To check the version of Office 2013 or later, go to File > Office Account > About Outlook.

For further help give us a call on 01455 209505.

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