3574380 - Partner Contacts are not available to be selected in a Workflow Rule

You are trying to create a Workflow Rule based on a Partner Contact but this object is not available.  Furthermore, Workflows based on the Contact object do not trigger when the conditions are met with a Partner Contact.

SAP Cloud for Customer

This is the expected behaviour of the system.  Currently, Partner Contacts cannot be used in Workflow Rules.

If you need this behaviour urgently, please see the following KBA: 2531827 - Functionality Currently not Available 

workflow partner contact, partner contact , KBA , LOD-CRM-WKF , Workflow , Problem