Voicemail Time Zone

Hi,

I have 1 server in US, and my users are registered from pakistan and
canada, now whenever my user left voicemail message the time attached
that is set on the server (US time zone), but i need pakistan time for
pakistani users and mountain time for canadain users. is there anybody
here can help me regarding this?

i will really appreciate this.
thanks

Regards,
Jehanzaib Younis
Office No: +1484-697-5558
Cell No: +92321-5139853

As i know that it could be done through tz option, i made a [zonemessages]
Asia=Pakistan/Karachi

when i write Asia in tz option, it does not give me the karachi or pakistan time, still getting the US time.

is there any one give me suggestions?

i will really appreciate this. thanks