Why do we need to refresh Sandbox before each Release? I read, previous Release(no preview), available if you after a specific date and latest Release(get the preview) if we request for refresh before a data. Can anyone throw some light and enlighten me!
Thanks
Best Answer
Before SalesForce do a major release they will have a preview window where you can choose to preview the new release before it is rolled out. SalesForce do this by upgrading some Sandboxes, see the table below.
If you are on an instance that automatically gets upgraded to the preview release window then you may want to refresh so that you are excluded from the preview.
Alternatively, if you are on an instance that does not automatically get upgraded then you may want to refresh so that you are on an instance that is upgraded.
This table shows the instances for Spring '15
Reference