AppExchange Packages and Sandbox Preview Window


YES - I plan to upload and/or install one or more AppExchange packages using one or more of my Sandbox instances during the Sandbox Preview Window.

Special attention must be paid to the upgrade schedule for both your Force.com Sandbox instance(s) and your Production instance if you use packaging. In most cases, both the source instance and the destination instance must be at the same release level in order to complete a full upload and install. See the table below for details.



AppExchange Packages FAQ

Question: I plan to upload an AppExchange package from my Sandbox instance in the next few days, and immediately install to my Production instance. Are there any limitations I should be aware of?
Answer: As long as you will complete this install prior to the Sandbox Preview Window there are no limitations. Just upgrade and install as usual; both instances will be on the Winter '10 release at that time.

Question: I need to upload a package from my Sandbox instance after the Sandbox Preview Window begins, and immediately install to my Production instance. Are there any limitations I should be aware of?
Answer: You will need to ensure that both your Sandbox instance and Production instance are the same release level in order to complete this action.

1. If your Sandbox instance and Production instance both reflect Summer ‘09 functionality you may upload and install your package as usual.

2. If your Sandbox instance and Production instance both reflect Winter '10 functionality you may upload and install your package as usual.

3. If your Production instance will reflect the current Summer ‘09 functionality at time of install, you will need to ensure your Sandbox instance also reflects Summer ‘09 functionality at time of upgrade. To ensure your sandbox does not participate in the Summer ‘09 Preview, click here 

4. If your Production instance reflects the Summer ‘09 functionality at time of install, you need to either: a) ensure your Sandbox participates in the Winter '10 Preview, click here  or b) wait until your current Sandbox instance upgrades to Winter '10 before installing to your Winter '10 Production instance.
Question: My Sandbox already reflects the Winter '10 Preview, but I need to make changes and install to my Spring ‘09 Production instance using packaging. I don't have any current configuration or data changes in my Sandbox that I want to keep. What should I do?
Answer: You will need to refresh your Sandbox one time after 12:01AM PDT September 10th, 2009 to ensure that your Sandbox instance reverts to Summer ‘09 functionality. Note: this refresh will delete the contents of your existing Sandbox copy. Once the refresh is complete and activated, make your changes, and upload and install your package as usual.

Question: I'm already developing in my Sandbox instance and plan to upload a package as soon as Winter '10 is available. When can I install to my Production instance?
Answer: You will need to ensure that both your Sandbox instance and Production instance are the same release level in order to complete this action.

  • If your Sandbox instance reflects the Winter '10 Preview at this time, you may install your AppExchange package as soon as your Production instance has been upgraded to Winter '10. Your production instance will be upgraded in early October and you will be receiving notification about the specific date and time.
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  • If your Sandbox instance is not participating in the Winter '10 Preview and reflects Summer ‘09 functionality, you have until October 10th, 2009 to complete your install. After this date, your Sandbox instance will also reflect Winter '10 functionality and you may upload and install your package as usual.


Question: How can I tell which server my Sandbox is on?
Answer: Log into your Sandbox at test.salesforce.com, then examine the URL in your browser address bar.



  • If you see tapp0.salesforce.com your Sandbox is on tapp0, and your Sandbox instance will be upgraded to the Winter '10 Preview on September 18th, 2009.
  • If you see cs2.salesforce.com your Sandbox is on CS2, and your Sandbox instance will be upgraded to the Winter '10 Preview on September 18th, 2009.
  • If you see cs3.salesforce.com your Sandbox is on CS3, and your Sandbox instance will be upgraded to the Winter '10 Preview on September 18th, 2009.
  • If you see cs1.salesforce.com your Sandbox is on CS1 and your Sandbox instance will be upgraded to the Winter '10 Release on October 10th, 2009.

If you have additional questions about your options for using packages with your Sandbox in conjunction with the Winter '10 release, please contact the salesforce.com Customer Support team.