Remote Sites

I have a client with 3 locations. All running Windows 2003 server. Their "main" location is where the Email MX DNS record is pointing and is hosing Exchange 2003 Standard. The 1st remote site has Exchange 2003 Standard as well and has 3 or 4 mailboxes moved over to its local store. The "main" location basically forwards mail their direction. The 2nd remote site i'm fixing to install Exchange and was bascially going to set it up the same as the 1st. However, I want the Email to flow no matter what. So if their "main" sites Internet goes down, I can prioritize the MX records and shift all mail to remote location 1 or 2? Make since?

But the main locations mailboxes are in the store on their server, remote 1's are in the store at that location and so will remote 2. How do I get them all talking and understanding that all 3 can receive mail for all mailboxes company wide? Bout the best way i could describe it...sorry.
CUBLA1Asked:
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VahikConnect With a Mentor Commented:
this is very easy to do....ask ur ISP to create three MX records with diffrent priority.....the lowest will be for the first site..and u can decide who will be second and third....
This will be a good solution for backing up ur internet connection....if the first line goes down the second will take over (based on ur MX priority settings)  and since all the exchange servers  will be in the same oeganization emails will automatically be delivered to correct mailboxes.........BUT ONE LITTLE PROBLEM.....now u need to install antivirus and antispam on all servers or locations depending on ur setup....

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