@Mramadhan Thank you for choosing McAfee support Community
1. There is no any such use case for FRP however i recommend to go through FRP FAQ from below link
https://kc.mcafee.com/corporate/index?page=content&id=KB858762. Its not mandatory to create User Key for all issues . User Key is exclusive only for the user and may not help other user.
Below are the Key types in FRP
FRP supports encryption using three types of keys:
Regular keys — Created by McAfee ePO administrators and can be used in any policy.
User personal keys — User personal keys is a per user unique encryption key generated in McAfee ePO when assigned to users. When a user is assigned a user personal key, the user can use this unique key on any FRP system managed by the same McAfee ePO.
User local keys — Created by the user using the FRP client software on a client system. The user can use these keys to encrypt or decrypt data. These keys are never backed up in McAfee ePO.
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Regards
Subramanian B
McAfee Employee