Update DNS A recrod

Question

Dear All,
I have formed a CAS Array (two members servers are part of it.
DNS entry for CAS array with IP address is "cas.testlab.local" and IP address is 10.10.10.1
As mentioned above Two members are part of my Array that is
Memsrv-1 and memsrv-2 with ips respectively (10.10.10.1 & 10.10.10.2)
What I wish is if Member server 1 goes down then IP address or CAS array should change to 10.10.10.2
and when member server 2 goes down then IP address or CAS array should change to 10.10.10.1
is it possible thru Powershell scripting I am not sure so requesting help
TheAtulA

Answer 1

If by 'CAS' you're referring to an Exchange Client Access Server array, use NLB. That's how I handle this and it works very well.
EDIT: While what Robert has posted may work, you'll have to be running the script constantly and is most likely not how the product is intended to be load balanced.
Example documents:
Exchange 2013:
https://technet.microsoft.com/en-us/library/jj898588%28v=exchg.150%29.aspx
Exchange 2010:
https://technet.microsoft.com/en-us/library/ff625247%28v=exchg.141%29.aspx
I highly recommend looking into the documentation and using a supported method.
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