You have a requirement to find Business partner by Email Id through Web Services using SOAP UI.
The web service mentioned in the documentation http://help-legacy.sap.com/saphelp_sapcloudforcustomer/en/PUBLISHING/PSM_ISI_ R_II_QUERY_BUPA_IN.html, is not available in the communication scenario for Query Business Partners.
Your requirement can be acheived using the Web Service II_QUERY_BUPA_IN FIND_PARTNER_BY_EMAIL_URI. This is an Operation and you are checking in Communication Scenario.
Follow the below steps to create a Communication scenario with this Operation:
1. Go to Administrator work center
2. Select Communication Scenario link under Integration
3. Select New and provide a Scenario name
4. Select Add Operation, in the new dialog box, you can find the Operation - Find business partner data using e-mail.
5. Add and Save the changes to use this Communication Scenario
KBA , SRD-CC-FED , Feeds , How To