Hi David,
Please check the below document on pricipal propagation. The
Principal propagation is available from SP10 of PI 7.0, so your SP is not supported
- XI 3.0 SP19, Web AS ABAP 6.40 Kernel Patch 149
- PI 7.0 SP10, Web AS ABAP 7.00 Kernel Patch 79
- PI 7.1 SP0
some more reference document
Principal Propagation with SAP NetWeaver Process Integration 7.1
regards,
Harish