The Salesforce Summer ‘16 release is quickly approaching and soon you'll be able to take advantage of exciting new features and functionality! If you are a Sandbox customer, you have the opportunity to get early access to Summer ‘16 in your Sandbox and test new customizations and features before your production organization is upgraded.

The Sandbox Preview window for Summer ‘16 is scheduled to begin May 6, 2016. If you would like your Sandbox organization to take part in the Summer ‘16 Preview, your Sandbox must be active on a preview instance by May 6, 2016 to take part in an overall instance upgrade.

Please read carefully and follow the instructions in the next section for specific information on how to handle each of your Sandboxes.  In most cases, you will not need to do anything because your Sandbox is already on a preview instance.  But you may need to take action by April 29, 2016 in order for your Sandbox to take part in the Summer ‘16 Preview.

General Information about the Sandbox Service

From the time your Production Instance (e.g. NA2, EU1, AP0) was upgraded, all Sandbox creation and refresh requests were routed to a Sandbox instance that will be upgraded for the preview.  We will continue to route these requests to Preview Sandbox Instances until April 29, 2016.

Starting April 30, 2016, all creation and refresh requests will be routed to non-preview instances until your production instance is upgraded to Summer ‘16.

You have from now until April 29, 2016 to decide if you would like your Sandbox to take part in the Summer ‘16 Preview. Follow the steps below for each Sandbox org that you have.

Note: If you have a full Sandbox, be mindful of the 29-day refresh policy and plan accordingly.

Sandbox Preview Window FAQ

I need to create a new Sandbox – What are my options?

I have an existing Sandbox – What are my options?

1) Determine your Sandbox instance

To determine which instance your Sandbox is on, log into your production org and navigate to your Sandbox List page (Search “Sandbox” in the Quick Find bar on the Setup Home Page).

Determine your Sandbox instance by using the Location column above.

2) Refresh? Or Don’t Refresh? Or Do Nothing?

Once you have located the instance that your Sandbox is on, use the chart below to determine if, when, and what action you should take on your Sandbox.


  • If you are refreshing onto a preview instance, do not refresh after you activate the Sandbox on your preview instance.  If you do, you will be refreshed to a non-preview instance.  Between April 30, 2016 and the date in which your production org is upgraded to Summer ‘16, all Sandbox refreshes will be directed to non-preview instances.  We cannot perform a refresh to a preview instance between those dates.
  • If you decide to stay on the current Spring ‘16 release, your Sandbox will not be upgraded to Summer ‘16 until June 11, 2016.

IMPORTANT - Plan Ahead!

The April 29, 2016 deadline is to cut off requests in an attempt to make sure that all preview requests can be met.  Do to the number of requests, we cannot guarantee that a request to create or refresh before the deadline will result in a sandbox org on a preview instance.

The sandbox copy must complete (pending activation or activated) before the overall instance upgrade starting on May 6, 2016.  If there are too many requests or if you have a large full sandbox and did not plan ahead, the request you made may not be processed by the time of the upgrade.

If you have a large full sandbox, please keep in mind how much time it takes to complete your Sandbox refresh to ensure your copy is completed by May 6, 2016.  If the sandbox copy does not complete by the upgrade on May 6th, the copy will be restarted to a sandbox instance that remains on the same version as your production instance. 

Plan Ahead! - You may need to request your refresh in advance of the April 29, 2016 deadline to ensure it completes by May 6, 2016.

AppExchange Preview Instructions

If you plan to upload and/or install one or more AppExchange packages using your Sandboxes during the Sandbox Preview Window, you should use the chart below to determine your course of action.


If you have additional questions about your Sandbox options in conjunction with the Summer ‘16 release, please contact Salesforce Customer Support.

Understanding the Preview Window Schedule

In addition to the steps above, use the following graphic to understand what will happen to your Sandbox if you request a new sandbox or refresh an existing sandbox.  For example, if your Sandbox is on CS2 and you refresh it after 12 AM PST on April 30, 2016, it will be moved to a non-preview Instance.