I am trying to introduce a front-end server to the existing exchange 2003 environment. Existing environment is as follows (everything is in the corporate network, not dmz):
- one exchange server 2003 sp2 enterprise edition holding public folder store and three mailbox stores with no more than 200 mailboxes all together
- smtp gateway server (windows 2003 sp2) which is the only one that has smtp port open through the PIX firewall. so all incoming and outgoing emails go via the smtp server that is published to outside world
- OWA and active-sync occurs directly with the exchange server. OWA uses SSL
I want to implement a front end server in the DMZ which will be used for mobile phone (active-sync) syncronization and OWA. I want all the other email traffic to continue to go via the smtp server (i plan to move this smtp server in the DMZ also sometime soon).
I have read a lot of documentation on steps involved for implementing front end server, but i still have some concerns which i'm not too clear about:
1. They say implement a front end server in the internal network first (to avoid firewall port issues) and then check the box "this is front end server" then restart. Do i need to worry about my regular mail traffic to suddenly start going via the front end server? Remember, i don't want to affect my regular mail traffic while i'm introducing the front end server
2. i need to enable pop3, smtp, and IMAP on this server so the different types of mobile phones can synchronize with the corporate exchange environment. Is that possible? and does that mean that i need to mount at least one mailbox store on the front end server, since i'm using smtp on this?
3. the smtp component on the front end needs to require authentication, so that mobile phones can authenticate first before it can relay mail via the FE server. How do i enable such authentication without affecting the other existing functionality of the front end?
Any help would be greatly appreciated