Sorry if this post already asking and and in wrong place

is there anyway to change the getAllMtaAuthURLs value from https to http, (IMHO) because of this if i run the command for backup zimbra mailbox
zmmailbox -z -m samuel.sappa@kantor.co.id getRestURL '//?fmt=tgz' > /tmp/samuel.tgz

this error message appear

ERROR: remote.CONNECT_FAILURE (https://surel.kantor.co.id:1403/service/admin/soap/) (cause: java.net.ConnectException Connection refused)

I already try to execute the command :
su - zimbra
zmtlsctl http
zmcontrol stop
zmcontrol start

and try to edit directly the files
/opt/zimbra/cyrus-sasl/etc/saslauthd.conf
and
/opt/zimbra/cyrus-sasl-2.1.23.3z/etc/saslauthd.conf
and then check the value using
zmprov gamau
the value of the getAllMtaAuthURL still https

I'm running
Release 6.0.7_GA_2470.DEBIAN5 DEBIAN5 FOSS edition
thank you very much for your help
Regards,
Samuel Sappa