Need to restrict requestors outside of BU assigned from Showing up when creating a Requisition

Summary:

While Creating A Requisition Users Are Able to See Requestor Outside Of Requisition Business Unit that they have been assigned and this needs to be restricted

We have went through the document : PRC:SSP:Restrict list of Requester While Creating Purchase Requisition ( Doc ID 2549942.1 ). And the steps involve updating employee role and change View All Public Person profile. But as updating this profile will takes employee search capability across board. Is there any alternate way or solution to overcome this ?

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