Thanks for the reply.
we have around 200 accounts. And as I have mentioned in production environemnt we have 2 servers where zimbra has been installed. One of it has been used for SMTP relay. so pls suggest.
We have one test enviornment so I can test upgrade on that.
And one more question. how many domain we can configure in zimbra ? as in near future we have to configure multiple domain in one server to support different client.
Thanks