Microsoft has extended support beyond the previously announced retirement date. To stay aligned, we’re extending support, too. However, Outlook 2007 retirement is still pending, and Microsoft has currently scheduled it for October 2017. To continue using Salesforce for Outlook after retirement, start migrating your sales reps to Outlook 2016, 2013, or 2010. Otherwise, reps’ items don’t sync between Outlook and Salesforce, and the side panel stops working. This change applies to both Lightning Experience and Salesforce Classic.