Turn On Lightning Experience (Previously Released Critical Update) Delayed Until January 2020
Where: This change applies to Group, Developer, Professional, Enterprise, Performance, and Unlimited editions for all orgs that don’t yet have Lightning Experience turned on.
When: This update was introduced under Critical Updates on January 28, 2019. The update starts auto-activating on a rolling basis in starting January 7, 2020
Who: Admins with the Modify All Data and Customize Application permissions see the critical update in Setup.
This update applies to all users with the Lightning Experience User permission enabled, including all users with standard profiles and users with custom profiles or permission sets that have the Lightning Experience User permission enabled. Custom profiles created before Winter ‘16 do not include the Lightning Experience User permission. Starting with Winter ‘16, any custom profile that was cloned from a standard profile does include the user permission, but admins can edit the profile to disable the permission.
Why: As part of our release process, we conduct rigorous testing and build in multiple checkpoints to ensure quality. We’ve discovered a potential technical issue unrelated to Lightning Experience that could impact your general experience with the Winter ‘20 release. To prioritize customer success, we’re applying an abundance of caution and delaying some post-release activities, including the Lightning Experience critical update.
How: You can self-enable Lightning Experience before January and we encourage you to do so to take advantage of everything it has to offer. As you know, Salesforce Lightning is the future of the Salesforce user experience and platform and it benefits everyone, from business leaders and users to admins and IT teams.
From Setup, enter Critical Updates in the Quick Find box, and then select Critical Updates. For Turn on Lightning Experience, click Review. When you’re ready to turn on Lightning Experience, you can activate the update either in Critical Updates or Lightning Experience in setup. We recommend that you test this update in a sandbox or Developer Edition org before activating the update in production.
We provide several tools that automate and speed up the transition process, including the Lightning Experience Transition Assistant. You can also visit the Lightning Now Trailblazer Community to get answers from Lightning Experience experts.