How to Verify That I Need Another CAS Server

We have one CAS server and I am thinking we need a second and to set up some load balancing. However, mgmt wants to know what the threshold is for one CAS server before introducing a second is needed. What do I need to be measuring or can someone point
me towards some documentation of what the limits are for a single CAS server before you need a second one?

Hi,
As far as I know, we can use performance monitor to check the client access server counters.
If most counters are over the expected value, we can add a new CAS server.
For more information about the proper value of the counters, you can refer to the following article:
http://technet.microsoft.com/en-us/library/ff367877(v=exchg.141).aspx
If you have any question, please feel free to let me know.
Thanks,
Angela Shi
TechNet Community Support

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How to Verify That I Need Another CAS Server

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