3816466 - Why is E-Mail address for Sixt direct connect booking not sent to vendor?

Sixt direct connect bookings made in Concur do not send an E-Mail address to vendor. Why?

Here is an example of segment created by Concur which does not have traveler's email address:

RP/STRWL2128/STRWL2128 WS/SU 11NOV20/1648Z MJM2F3
1.XXX MR
2 CCR SX HK1 STR 10JAN 11JAN MCMR/BS-XXX/ARR-1200
/CD-XXX/DO-STRT01*FLUGHAFENSTR. 43/MWZ/ES-*SX*EUR 68.31
1D/LC-STRT01/NM-XXX MR/PUP-STRT01*FLUGHAFENSTR. 43
/MWZ/RB-*SX*EUR34.00 BR-1DY/RC-XXX/RG-*SX*EUR 34.00 .00
UNL DY/RT-1200/SQ-STR-NVS/SI-ALFAROMEOIFPOSSIBLE
/CF-XXX*SX/

Email for Sixt dc , KBA , CON-CA , Cross Applications , CON-CA-TLS-IEM-IMP , Import Credit Cards , Problem