We Have Exchange 2010 environment,We have two CAS servers in the site with NLB configuration. Recently after patching ,one of the CAS servers started behaving erratically and would give password prompting errors etc ..despite escalating the call the problem was not resolved,Since then I have taken the CAS server out of the NLB. Now the CAS is being serviced by a single server in the NLB cluster.
My requirement is bring back a new CAS server which will work as a standby just in case the existing CAS server fails.
What are my options ?
Is it possible to bring in a 3rd CAS server to the existing NLB ? if yes what is the procedure.
Please advice
Shiva