You want to assign Leads that originate from source 'External Partner' to a sales employee.

Lead Routing to Employee is the setting that allows you to assign Leads to a specific sales employee based on certain attributes, such as the source of the Lead. This feature is part of the Digital Sales Engagement for Business Users capability in SAP Service Cloud Version 21. You can configure Lead Routing to Employee rules in the following path: Settings → Leads → Lead Routing to Employee2. The other options are not related to this setting. Qualifications are the criteria that determine the quality of a Lead3. Status is the current stage of a Lead in the sales process. Party Schema is the structure that defines theparties involved in a Lead, such as the account, contact, or partner. References = 1: SAP Service Cloud Version 2 Features | SAP Help Portal 2: Configuring Lead Routing Rules - SAP Learning 3: Solution Guide for SAP Service Cloud - SAP Online Help : [Lead Status - SAP Online Help] : [Party Schema - SAP Online Help]