This usually happens because being added to a Service Desk doesn’t automatically give a user the permissions needed to be a Project Lead. Make sure the engineer is added as a project user (not just a customer), has the Project Administrator permission, and is an active, licensed Jira user. Once those permissions are in place, assigning them as Project Lead from Project Settings should work normally.
Hi @Giselle
Welcome to community!
Could you explain more about the issue?
What is the error/observation that prevents from setting the project lead?
Does the user have JSM agent license?
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