- Go to SAP > ECP
- Enter Login Credentials to logon into SAP - ECP Modules.
- Type Tcode ZMODPMS
- Click Postbag and Postbox booking reports under Report
- Type concerned Facility ID
- Press Enter
- It shows all details
- In that report booking ID is available.
- Booking ID will be use hereafter for Postbox and Postbag customer
