Two NLB Cluster at one CAS Server

Hi Team
I have a issue, I have three CAS Server with CAS array configuration enable.
and then I have third party app in my CAS server.
so I have two cluster nlb config in my CAS server, one is a securemail.contoso.com
the member is CAS01 and 02. this is for third party app
the other is webmail.contoso.com
this is for Exchange CAS. the member is CAS01,02,and 03
suddenly my CAS01 cant be ping and I had event id nlb 18
http://technet.microsoft.com/en-us/library/dd348820(v=ws.10).aspx
I there any misconfig with my CAS?
Thanks

Hi Ichwan Lubis,
I think it should be an NLB issue which is more than an Exchange issue. I’d like to know whether the Outlook lost the connection when the CAS01 was down. Does the CASArray automatically
failover to other CAS members?
For NLB event errors, it’s recommended to ask on our Windows Server forum:
http://social.technet.microsoft.com/Forums/windowsserver/en-US/home?category=windowsserver
Thanks,
Simon Wu
TechNet Community Support

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