Case Study: Exchange 2010 Load Balancing

Client Type:


Medical, 5 locations, 300 users


Challenge:

  • 100% dependency on Exchange email system for business referral and revenue stream
  • Contracts stipulating that referred patients must be seen within certain time frame
  • Single Exchange 2007 server, hosted at one location, very slow response time for satellite sites
  • Multiple spam issues

Risks:

  • Data loss because of single site
  • Email system failure if connectivity is lost to hosting site
  • Severe contract violations if emails fails to reach users
  • Email system can not be down.



Constraints:

  • Strict internal HIPPA policies prohibiting hosting email with 3rd party vendors
  • Single Exchange 2007 server, with misconfigured domain controller
  • Large User mailboxes with few archiving



Resolution:

  • Implement load balanced Exchange 2010 farm with replication between sites on both mailbox and ClientAccess Server levels
  • Implement DNS load failover to create reliable routing in case of one site failure
  • Implement Open Source POP3 email system as a backup to the main Exchange 2010 email system