Salesforce Summer '18 Sandbox Preview Instructions
Salesforce.com Summer’18 Release Calendar : -
- Between
now and May 4, 2018 all sandbox requests will be routed to Preview
Instances for which SFDC Summer’18 platform upgrade will happen on May
4/5, 2018.
- On
May 4, 2018, all incomplete sandbox requests will be reset on a
Non-Preview Instance for which SFDC Summer’18 platform upgrade will happen
on June 8/9, 2018.
Reference link -
