The list of Summer ’17 below only apply to Salesforce Classic.
1.Lightning Experience Migration Assistant. Who can miss this section in Classic setup?
The assistant tool provides links to “Learn” about LEX, “Check Readiness”, “Preview”, “Optimize with Features”, “Set Up Users” and “Turn It On.” In the “Set Up Users” section, you can specify which users you are going to switch to LEX.
Check Readiness delivers a report in a few minutes to your inbox. The report will go through various sections and provide an assessment. Here is an example of the Lightning Readiness Report for the related lists in my org.
2. Update existing Letterhead email templates by changing which letterhead is associated with the template.
3. Control the Order and Order Product fields that appear on a Visualforce page with field sets.
4. Cloud Scheduler retirement: Unavailable in Salesforce orgs created in Winter ‘17 or later. If you enabled Cloud Scheduler before Winter ‘17, it remains available until Winter ’18.
5. Stay-in-Touch feature officially retires. The Request Update button will be removed in Summer 17.