How can i update z fields in CRMD_ACTIVITY_H

Hi everyone,

I`m looking for some function o whaterver it works to update z fields in CRMD_ACTIVITY_H.

I have tried with CRM_ACTIVITY_H_MAINTAIN_OW but it was useless.

They said that the extensionin of BAPI 'BAPI_ACTIVITYCRM_CREATEMULTI' would work but it doesn`t.

Thanks!