Locking Fields on HRHD SR after initial creation

Summary

Setup Request: Employees can create HRHD SRs, but they should not be able to update certain fields on the summary page after they create it.

Content

Hi All,

Need: Employees can create service requests, however they should not be able to update certain fields on the summary page, such as the Assigned To field.

Currently State: Employees can make service request but can also go back and make edits to all fields on the summary page.

Question: How can we prevent them from making edits on fields that the Help Desk Manager/Agent is responsible for, such as the Assigned To field?