hi ,
Thank you for your fast response,
i am evaluating the zimbra features vs exchange 2010 as we are planning to implement zimbra in our environment.
Microsoft Uses ESE technology which is used as middleware for exchange to communicate to db eg;
outlookclient --> exchange --> ESE --> DB
New Exchange Core Store Functionality: Exchange 2010 Help
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So want to know how is the data stored with zimbra or database management done .