E14 – New-ClientAccessArray
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In simple terms a CAS Array is a set of Exchange 2010 CAS servers that are load balanced using either Windows Network Load Balancing, Microsoft ISA Server or a third party load balancing appliance.
Without configuring a CAS Array the Outlook client will connect to a single CAS server within the Active Directory Site and the connection would fail should that CAS server go offline.
•So the array configuration takes two steps which are:
1. Configure the CAS servers in a Windows Network Load Balancing cluster.
2. Configure the CAS Array in Exchange.
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There can be only one CAS array configured per Active Directory Site.
Also while creating a new Mailbox database in the AD site, the value for the CAS Array was automatically picked up.
New-ClientAccessArray –name “BQT CAS Array” –FQDN BQT-CAS.MSFT.corp.com
[PS] C:\Windows\system32>New-ClientAccessArray -name "MSFT CAS Array" -Fqdn "mail.MSFT.com" -Site "BQT"
[PS] C:\Windows\system32>Get-ClientAccessArray | fl
RunspaceId : ebdf1c27-5bea-4340-ac8e-bade81284e3d
Fqdn : mail.MSFT.com
Site : corp.com/Configuration/Sites/BQT
SiteName : BQT
Members : {BQT-E14CAS1}
AdminDisplayName :
ExchangeVersion : 0.1 (8.0.535.0)
Name : MSFT CAS Array
DistinguishedName : CN=MSFT CAS Array,CN=Arrays,CN=Exchange Administrative Group (FYDIBOHF23SPDLT),CN=Administrative Gr
oups,CN=MSFT,CN=Microsoft Exchange,CN=Services,CN=Configuration,DC=corp,DC=com
Identity : MSFT CAS Array
Guid : 0a28a536-c7c7-4cfe-a3ce-69df9a2ab712
ObjectCategory : corp.com/Configuration/Schema/ms-Exch-Client-Access-Array-2
ObjectClass : {top, server, msExchExchangeServer, msExchClientAccessArray}
WhenChanged : 2010/3/18 下午 01:29:48
WhenCreated : 2010/3/18 下午 01:29:48
WhenChangedUTC : 2010/3/18 上午 05:29:48
WhenCreatedUTC : 2010/3/18 上午 05:29:48
OrganizationId :
OriginatingServer : dc13.MSFT.corp.com
IsValid : True
Get-ClientAccessArray -site bqt | Set-ClientAccessArray -name "BQT-CAS-Array"
Get-ClientAccessArray -site bqt | Set-ClientAccessArray -fqdn bqt-cas.MSFT.corp.com
Blog Extended Reading
More Information & Reference
1. New-ClientAccessArray
2. Uncovering the new RPC Client Access Service in Exchange 2010 (Part 1)
3. Exchange 2010 & CAS Array with NLB
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