Update October 8, 2019
Salesforce just released the following Salesforce Alert!
Delay in Winter '20 Turn on Lightning Experience
What is the change?
The Winter '20 Turn on Lightning experience critical update has been delayed.
Why is this change happening?
At Salesforce, ensuring customer success through trusted system availability, performance, and reliability is our top priority. 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. We apologize for any inconvenience you may experience as a result of this delay.
What's the impact to Partners?
Partners who were planning to switch to Lightning Experience with the Winter ‘20 critical update must plan for the updated timing of January 7, 2020 (see below under what action do I need to take?). Partners will also need to notify their customers of the delay and impact on timing.
What action do I need to take?
The “Turn on Lightning Experience” critical update will now activate within 72 hours of January 7, 2020. Please notify your customers that they can, however, self-enable Lightning Experience before January and we encourage customers to do so to take advantage of everything Lightning Experience has to offer. If your customers have been preparing for the critical update, they can be confident that this delay isn’t related to Lightning Experience and they’re safe to enable the new interface now. We provide a number of tools that automate and speed up the transition process, including the Lightning Experience Transition Assistant. Customers can also visit the Lightning Now Trailblazer Group to get answers from Lightning Experience experts.
Where can I go for more information?
Back in March 2019, I threw up this Blog on Salesforce Auto-Transition to Lightning Experience.
So a few things have changed that warranted an update so I figured to keep it simple, I'd bring you another blog post.
So first things, first. Ignore that other blog post. It's a brave new world and I hope to break it down for you.
Starting with Salesforce Winter '20, there is a Critical Update called "Turn on Lightning Experience" that will be auto enabled on October 11, 2019 (your date may vary depending on when your instance is upgraded to Salesforce Winter '20).
You'll probably notice this Critical Update is already active in Org. However, on or about October 11th, the Critical Update will go into effect. So what exactly does this critical update do?
First, it will automatically turn on Lightning Experience in your org. What we mean by this, is that after the Critical Update is made permanent, when you navigate to Lightning Experience Transition Assistant and click on "Get Started"
and then navigate to Path 2 Roll Out Phase and click on "Go to Steps"
and finally go to Step 4, Launch Lightning Experience, the "button" to turn on Lightning Experience will be set to On, however, it will be grayed out as you will not be able to turn off Lightning Experience from this point forward.
Any out of the box Salesforce profiles, such as System Administrator, Standard User, Standard Platform User, will all have the "Lightning Experience User" permission turned on by default.
How can you determine what a Salesforce out of the box profile is? When you navigate to Manage Users | Profiles, you'll see a list of all the profiles in your Org. Any profiles whose only actions are Edit and Clone are Salesforce out of the box profiles. All other profiles that have Edit | Del | Clone are really custom profiles; that includes profiles you may commonly associated with BMC Helix Remedyforce such as ServiceDesk Staff or ServiceDesk Client.
If you have users assigned to any of the Salesforce out of the box profiles, those users will find themselves now in the Salesforce Lightning Experience. Other users that may be in customer profiles may not find themselves in the Lightning Experience, but if they do, that means more than likely either their profiles has the Lightning Experience User permission enabled:
Or they may have a permission set assigned to them where the Lightning Experience User permission has been granted to them.
Keep this in mind if you have users who may not be ready for Lightning. You'll probably want to do a review in anticipation of this change and take the appropriate actions. Additionally, after October 11th, keep in mind if you clone a Salesforce out of the box profile, that the Lightning Experience User permission will be enabled by default.
For additional details or questions, we refer you to the Turn On Lightning Experience Critical update FAQ. Please note that Salesforce Classic is still available; however, users may find that have to switch back if that is their preference and they fall into an standard profile.