Update! On May 2018 an Microsoft Dynamics Outlook client has been published for Dynamics Online, please refer blog article: https://mytechblog365.karinreuter.de/dynamics-365-online-for-outlook-version-9-0-outlook-client/
Version 8.2.2.137 Update for Dynamics 365 for Microsoft Outlook
Microsoft has released Dynamics 365 for Microsoft Outlook version 8.2.2.137 update. This update includes support for Transport Layer Security (TLS) 1.2, which is required for connecting Dynamics 365 for Outlook with Dynamics 365 (online), version 9.0.
Date published: 12/11/2017
Find Download for this version here: https://www.microsoft.com/en-us/download/details.aspx?id=56327
Note! This update is not documented in the update list for CRM 2016 /Dynamics 365!