Monday , November 9 2020

How to Load balance Client access Server in Exchange Server 2013 – High Availability


Unlike Exchange 2010 , You need not to have a Create Client Access Array .

Just have a Hardware Load Balancer like CISCO ACE , KEMP , F5  , Have the Exchange Servers in the farm , Exchange server can start serving requests to the clients .

Its quite simple and easy.


The above diagram is a Good Design for minimum cost . With High Availability Configured


We will need two VIP’s to Configure Mail flow and Client access ,

In my Scenario , Have used Cisco ACE to Load balance the Client Access and Mailflow.


Create Two Server Farms –




Assigned One Virtual IP to CASArray Server Farm


Assigned One Virtual IP to Mailflow Server Farm


No Extra Configuration required on the Client Access Servers.

It will start serving the Requests.

Make sure your Predictor is Round Robin basis. So that Both the servers will be functional . with better performance.


For Mailbox Server High Availability –> You need to Create a Database Availability Group (DAG)



About Satheshwaran Manoharan

Satheshwaran Manoharan is an Microsoft Office Server and Services MVP , Publisher of Specialized in Office365 / Microsoft Exchange / Virtualization , Sathesh is an Messaging Expert supporting/Designing/Deploying many medium size businesses to large enterprises when it comes to Corporate messaging and Virtualization Infrastructure

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One comment

  1. Hi,
    hope you are doing well
    i have around 76 mail boxes which need to relocate to different exchange server. currently we have outsourced mail service.which one is the best office 365 or exchange server hosing our own.?
    how we can migrate mail box?
    how can we transfer GAB?


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