Thank you very much for your advice
It's good to inform VO, it's not must or mandatory to inform once you cahnge employer.
you must have to inform:
if you get marry or you child get marry / you divorced / widow.
you have new born baby / death of dependents like spouse or child.
passport renewed (including you , spouse and your childs).
completion of education if pending any degree or diploma or masters or phd.
change in residence mailing address.
you must have to update VO in above cases.
otherwise it's okay if you forget to update VO.
OMM