We are using CRM 2016 on premise and using the Outlook client for 2016 (update 1 I believe) . This is with Office 365.
It is pre-configured to our 2016 org environment. However, the configuration wizard will not open without an exception. Exception error is "An item with the same key has already been added"........ The dialog provides a link to resolve which provides a KB article mentioning a duplicate entry in the sitemap as a possible cause. Checked the sitemap in our org and no issues that I can tell in that regard.
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