Quotas on /export/home

Hello all,
I am trying to set quotas on /export/home filesystem for some of our users on a Solaris Zone I know that you would be redirecting me to some of the documentation pages, but I have already done that.

The /export/home on the Zone is a Veritas FS and I cannot see an entry for /export/home in /etc/vfstab file.

# edquota username
/etc/mnttab: no UFS filesystems with quotas file

# quotaon -v /export/home
Cannot do /export/home

DO I have to change the mount option to rq in /etc/mnttab for /export/home. If I do, will it persist across reboots?

you should edit /etc/mnttab and you can't. it gets auto editted when the system boots upon verification of the mount points.
How to Configure File Systems for Quotas (System Administration Guide: Advanced Administration) - Sun Microsystems

Thank you Incredible but as I mentioned earlier, I have already gone over that link.

I want to set quotas on a Zone and I don't see and entry for /export/home in /etc/vfstab.

An example is here, but using zfs
Solaris Zones

Which one ?
Vxfs isn't supported in Solaris zones. Lofs is the way to give access to a global zone filesystem/directory to a zone.

# edquota username
/etc/mnttab: no UFS filesystems with quotas file
 

Why are you using a UFS command for an assumed VXFS filesystem ?
That should be vxedquota and likely to be run in the global zone.