This Knowledge is to prevent customer community users cannot log in to Field Service app." with: "This article describes the minimum permissions and configuration steps required to allow a Customer Community user to successfully log in to the Salesforce Field Service mobile app. If additional permissions are needed beyond the minimum, add them after completing the steps below.
This is the minimum procedures to log in with Customer Community User on Field Service Mobile app.
If you would like to add more permissions for the user, please add them accordingly.
Additional Resources :
Create Field Service Permission Sets
Field Service Mobile App Requirements
Field Service Mobile App Limitations
Give Contractor Service Resources Access to the Field Service Mobile App
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