Disabling Switch to Classic
In general you can switch lightning Experience to Classic by clicking the option Switch to Salesforce Classic
In Salesforce we can setup the user to use only Lightning Experience. To implement the same follow the below step,
Step 1 : Go to Setup
Step 2 : Enter Profile in Quick find box
Step 3 : Select the Profile which the user assigned to (Here we chose Standard Platform User copy )
Step 4 : Search and ensure Lightning Experience User is check box is ticked to this profile
Step 5 : Search for Hide Option to Switch to Salesforce Classic and tick the checkbox
Step 6 : Click Save
Step 7 : Login to the particular user whose assigned with this profile
Step 8 : You can see there is no option to Switch to Classic
Note : If the standard profile doesn’t allow you to activate the option Hide Option to Switch to Salesforce Classic then you need to clone the profile and assign the user. So that you can activate the option.
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