Is it possible to modify the Call Home email server via Unisphere?

I need to modify the Call Home email server on some VNX5300 and VNX5500s.

I know this can be done via the /nas/sbin/nas_connecthome command.

However, currently I only have nasadmin credentials for ssh access.

This account allows me to run that command with a -info parameter so that I can see the old email server settings that need changing, but when I try to change the email server, I get the following error: " /nas/sbin/nas_connecthome -modify : Only root can perform this operation."

I can get the root password if required, but my manager has asked me if this can be done via Unisphere web interface (which I have 'sysadmin' credentials for).

Could someone please let me know whether it is possible to do this via Unisphere, or do I have to request root passwords to make this change.

Thanks for any responses.

Tom