The specified computer isn't a Client Access server.

Hi, people.

If you can answer this question, thank you.

I found this error below in an environment that has 10 CAS and Mailbox 6:

*** The specified computer is not a Client Access server. ***

This error occurs only when you run a test command in CAS.

I made some research and only found some similar and others with the same error message and different cause.

Have you seen this error ever in any environment?

Have a nice day.

Reference: https://social.technet.microsoft.com/forums/exchange/en-US/b25b6f21-dd24-41d9-8de4-037be1daed3f/exchange-2013-cannot-login-using-imap

http://www.postseek.com/meta/270471fc9f1ef893e73f5cfa37ad7c9e

#Replicating the error:

[PS] C:\>Get-ExchangeServer brphexcas10 | select ServerRole,Edition,AdminDisplayVersion | FL


ServerRole          : ClientAccess
Edition             : Enterprise
AdminDisplayVersion : Version 15.0 (Build 1044.25)



[PS] C:\>Get-ClientAccessServer BRPHEXCAS10 | Test-ActiveSyncConnectivity -Verbose
VERBOSE: [20:35:41.845 GMT] Test-ActiveSyncConnectivity : Runspace context: Executing user: prod.domain.local/PoC
Embratel/Evandro Semedo, Executing user organization: , Current organization: , RBAC-enabled: Enabled.
VERBOSE: [20:35:41.876 GMT] Test-ActiveSyncConnectivity : Active Directory session settings for
'Test-ActiveSyncConnectivity' are: View Entire Forest: 'False', Default Scope: 'prod.domain.local', Configuration
Domain Controller: 'ad01.prod.domain.local', Preferred Global Catalog: 'ad01.prod.domain.local', Preferred Domain
Controllers: '{ ad01.prod.domain.local }'
VERBOSE: [20:35:41.907 GMT] Test-ActiveSyncConnectivity : Beginning processing Test-ActiveSyncConnectivity
VERBOSE: [20:35:41.907 GMT] Test-ActiveSyncConnectivity : Instantiating handler with index 0 for cmdlet extension agent
 "Admin Audit Log Agent".
VERBOSE: [20:35:41.923 GMT] Test-ActiveSyncConnectivity : Current ScopeSet is: { Recipient Read Scope: {{, }},
Recipient Write Scopes: {{, }}, Configuration Read Scope: {{, }}, Configuration Write Scope(s): {{, }, }, Exclusive
Recipient Scope(s): {}, Exclusive Configuration Scope(s): {} }
VERBOSE: [20:35:41.970 GMT] Test-ActiveSyncConnectivity : Admin Audit Log: Entered Handler:OnComplete.
The specified computer isn't a Client Access server.
    + CategoryInfo          : ObjectNotFound: (:) [Test-ActiveSyncConnectivity], LocalizedException
    + FullyQualifiedErrorId : [Server=BRPHEXMBX04,RequestId=c1eb0eee-eea2-43fa-9b3d-0d18a4315878,TimeStamp=4/27/2015 8
   :35:41 PM] [FailureCategory=Cmdlet-LocalizedException] A8F4DD52,Microsoft.Exchange.Monitoring.TestMobileSyncConnec
  tivity
    + PSComputerName        : brphexcas10.prod.domain.local

VERBOSE: [20:35:41.985 GMT] Test-ActiveSyncConnectivity : Ending processing Test-ActiveSyncConnectivity
[PS] C:\>

########################################################################################################################

[PS] C:\>Get-ClientAccessServer | Test-OutlookWebServices -Identity userco1201@testedomain.net -MailboxCredential (Get-Credential)

cmdlet Get-Credential at command pipeline position 1
Supply values for the following parameters:
Credential
Creating a new session for implicit remoting of "Get-ClientAccessServer" command...
The specified server, BRPHEXCAS01, isn't a Client Access server.
    + CategoryInfo          : InvalidArgument: (:) [Test-OutlookWebServices], TestWebServicesTaskException
    + FullyQualifiedErrorId : [Server=BRPHEXMBX02,RequestId=2ddead98-8959-4f6a-bf8e-810027ac4f65,TimeStamp=4/28/2015 1
   2:18:08 PM] [FailureCategory=Cmdlet-TestWebServicesTaskException] 90CBBD16,Microsoft.Exchange.Monitoring.TestOutlo
  okWebServicesTask
    + PSComputerName        : brphexcas10.prod.domain.local

The specified server, BRPHEXCAS04, isn't a Client Access server.
    + CategoryInfo          : InvalidArgument: (:) [Test-OutlookWebServices], TestWebServicesTaskException
    + FullyQualifiedErrorId : [Server=BRPHEXMBX02,RequestId=2ddead98-8959-4f6a-bf8e-810027ac4f65,TimeStamp=4/28/2015 1
   2:18:08 PM] [FailureCategory=Cmdlet-TestWebServicesTaskException] 90CBBD13,Microsoft.Exchange.Monitoring.TestOutlo
  okWebServicesTask
    + PSComputerName        : brphexcas10.prod.domain.local

The specified server, BRPHEXCAS02, isn't a Client Access server.
    + CategoryInfo          : InvalidArgument: (:) [Test-OutlookWebServices], TestWebServicesTaskException
    + FullyQualifiedErrorId : [Server=BRPHEXMBX02,RequestId=2ddead98-8959-4f6a-bf8e-810027ac4f65,TimeStamp=4/28/2015 1
   2:18:08 PM] [FailureCategory=Cmdlet-TestWebServicesTaskException] 90CBBD69,Microsoft.Exchange.Monitoring.TestOutlo
  okWebServicesTask
    + PSComputerName        : brphexcas10.prod.domain.local

The specified server, BRPHEXCAS03, isn't a Client Access server.
    + CategoryInfo          : InvalidArgument: (:) [Test-OutlookWebServices], TestWebServicesTaskException
    + FullyQualifiedErrorId : [Server=BRPHEXMBX02,RequestId=2ddead98-8959-4f6a-bf8e-810027ac4f65,TimeStamp=4/28/2015 1
   2:18:08 PM] [FailureCategory=Cmdlet-TestWebServicesTaskException] 90CBBD68,Microsoft.Exchange.Monitoring.TestOutlo
  okWebServicesTask
    + PSComputerName        : brphexcas10.prod.domain.local

The specified server, BRPHEXCAS07, isn't a Client Access server.
    + CategoryInfo          : InvalidArgument: (:) [Test-OutlookWebServices], TestWebServicesTaskException
    + FullyQualifiedErrorId : [Server=BRPHEXMBX02,RequestId=2ddead98-8959-4f6a-bf8e-810027ac4f65,TimeStamp=4/28/2015 1
   2:18:08 PM] [FailureCategory=Cmdlet-TestWebServicesTaskException] 90CBBD14,Microsoft.Exchange.Monitoring.TestOutlo
  okWebServicesTask
    + PSComputerName        : brphexcas10.prod.domain.local

The specified server, BRPHEXCAS05, isn't a Client Access server.
    + CategoryInfo          : InvalidArgument: (:) [Test-OutlookWebServices], TestWebServicesTaskException
    + FullyQualifiedErrorId : [Server=BRPHEXMBX02,RequestId=2ddead98-8959-4f6a-bf8e-810027ac4f65,TimeStamp=4/28/2015 1
   2:18:08 PM] [FailureCategory=Cmdlet-TestWebServicesTaskException] 90CBBD12,Microsoft.Exchange.Monitoring.TestOutlo
  okWebServicesTask
    + PSComputerName        : brphexcas10.prod.domain.local

The specified server, BRPHEXCAS06, isn't a Client Access server.
    + CategoryInfo          : InvalidArgument: (:) [Test-OutlookWebServices], TestWebServicesTaskException
    + FullyQualifiedErrorId : [Server=BRPHEXMBX02,RequestId=2ddead98-8959-4f6a-bf8e-810027ac4f65,TimeStamp=4/28/2015 1
   2:18:08 PM] [FailureCategory=Cmdlet-TestWebServicesTaskException] 90CBBD15,Microsoft.Exchange.Monitoring.TestOutlo
  okWebServicesTask
    + PSComputerName        : brphexcas10.prod.domain.local

The specified server, BRPHEXCAS08, isn't a Client Access server.
    + CategoryInfo          : InvalidArgument: (:) [Test-OutlookWebServices], TestWebServicesTaskException
    + FullyQualifiedErrorId : [Server=BRPHEXMBX02,RequestId=2ddead98-8959-4f6a-bf8e-810027ac4f65,TimeStamp=4/28/2015 1
   2:18:08 PM] [FailureCategory=Cmdlet-TestWebServicesTaskException] 90CBBD1F,Microsoft.Exchange.Monitoring.TestOutlo
  okWebServicesTask
    + PSComputerName        : brphexcas10.prod.domain.local

The specified server, BRPHEXCAS09, isn't a Client Access server.
    + CategoryInfo          : InvalidArgument: (:) [Test-OutlookWebServices], TestWebServicesTaskException
    + FullyQualifiedErrorId : [Server=BRPHEXMBX02,RequestId=2ddead98-8959-4f6a-bf8e-810027ac4f65,TimeStamp=4/28/2015 1
   2:18:08 PM] [FailureCategory=Cmdlet-TestWebServicesTaskException] 90CBBD1E,Microsoft.Exchange.Monitoring.TestOutlo
  okWebServicesTask
    + PSComputerName        : brphexcas10.prod.domain.local

The specified server, BRPHEXCAS10, isn't a Client Access server.
    + CategoryInfo          : InvalidArgument: (:) [Test-OutlookWebServices], TestWebServicesTaskException
    + FullyQualifiedErrorId : [Server=BRPHEXMBX02,RequestId=2ddead98-8959-4f6a-bf8e-810027ac4f65,TimeStamp=4/28/2015 1
   2:18:08 PM] [FailureCategory=Cmdlet-TestWebServicesTaskException] 359329F2,Microsoft.Exchange.Monitoring.TestOutlo
  okWebServicesTask
    + PSComputerName        : brphexcas10.prod.domain.local

April 28th, 2015 8:55am

That's a common issue since 2013 was released. The CAS proxy any connections to a Mailbox Server, and if you force it to a CAS, it throws that error because the 2013 CAS role doesn't render or handle client connections the way it did in 2007 and 2010.

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April 28th, 2015 8:39pm

Obrigado!
April 30th, 2015 4:03pm

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