The logonid ACC-SRCE field is not updated for logonids for jobs that use the //*JOBFROM statement, the last access fields ACC-CNT, ACC-DATE, and ACC-TIME logonid fields are updated once a day.
The //*JOBFROM statement lets a job run under a logonid different than that of the submitter, without the submitter providing a password.
Use of the JOBFROM statement bypasses PASSWORD, RESTRICT, PROGRAM, SUBAUTH and SOURCE logonid checks (restrictions). Use of the JOBFROM will only update the last access fields ACC-CNT, ACC-DATE, and ACC-TIME of the logonid once a day (the first use). The last access ACC-SRCE field will not be updated.
Details on the use of //*JOBFROM statement can be found in the ACF2 Security for z/OS Administrator Guide in Chapter 20: JES Security Overview, section "JCL Extensions", sub-section "//*JOBFROM".