What is the requested enhancement?
The customer requested to enable delegation of tasks only for a restricted list of users ( Managers ) and disable it for all participants of a task.
As explicitly asked in the ticket: we should build something similar to the parameter "Replier_Backlist (Participants without possibility to reply " that restrict selected user from replying to user Messages.
Furthermore, we could setup a parameter "Delegate_BlackList" where users restricted from delegating could be specified.
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