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bigeric

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MS Exchange & AD Server Information Synchronization between two offices in different locations

My existing office is in US and I am going to have another office in HK.  There is 1 x Exchange 2003 standard and 1 x AD server in my US Office.  I am planning to setup 1 x Exchange 2003 standard server and 1 x AD server in my HK Office too.  However,  I am not sure

(1) How can I synchronize domain information between two AD server ? Can each AD server backup each other ?

(2) How can I synchronize mailbox between two Exchange server ? Can each exchange server backup each other ?

As I am new to Microsoft environement, please try to explain in details or refer me to some document

thx a lot
Eric
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Thx a lot for your advice.  I would like to know more about the failover issue.

(1)For the two AD servers,  they will be setup as two domain controllers under the same forest and data will be replicated between them.  let's say, in case the one in US fails, can end users switch to the AD server in UK, is the process transparent to user or user had to do something ?

(2)For the two Exchange servers,  data will be replicated between the servers.  However, how can I setup two servers to provide resiliency.  Will it be in Active/Passive or Active/Active ?  It is because I want users in two locations use their local server (UK users use UK Exchange Server and US users use US server).  In case there is any problem on either server, the remaining server can provide service for users in both US and UK.  Does client need to change any client setting or do I need to change the MX record for server switching ?

thx
Eric
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