I cannot test webservices or Outlook connectivity, I keep on getting the error that the credentials can not be used. I have checked if the user "extest_1eb30811639a4" exists and it is there. I have run the command "new-TestCasConnectivityUser.ps1" but still I get errors on all my 3 CAS servers. I also get the error message below on all my 3 cas servers when I run test Outlook connectivity, I don't know if they are related.

Verbose: Target User = 'extest_1eb30811639a4@company.intra'
Verbose: Resolved server.  Server Name = 'CAS01', Server FQDN= 'CAS01.company.intra'
Verbose: Selected RPC Proxy authentication method = 'NTLM'
Verbose: Based on RpcTestType, the cmdlet needs to dynamically look up the endpoint that uses this server as reference point.
Verbose: Target Client Access server = 'CAS01.company.intra'
Verbose: Based on RpcProxyTestType, the cmdlet needs to dynamically look up the endpoint that uses this server as reference point.
Verbose: Target Client Access server = 'CAS01.company.intra'
Verbose: Using connection parameters : 'company.intra\extest_1eb30811639a4: RpcProxy/RPC-over-HTTP, [CAS01.company.intra/NTLM]'
Verbose: Pinging RpcProxy at the following URL: https://CAS01.company.intra/rpc/RpcProxy.dll.
Verbose: An unexpected exception occurred while pinging RpcProxy. The most common reason for this occurring is that the IIS DefaultAppPool isn't running. Exception: The remote server returned an error: (401) Unauthorized.
Verbose: Mailbox = 'company.intra\extest_1eb30811639a4', Owner = '/o=company/ou=Exchange Administrative Group (FYDIBOHF23SPDLT)/cn=Recipients/cn=extest_1eb30811639a4'

Diagnostic command: "Test-OutlookConnectivity -RpcProxyTestType:Internal -RpcTestType:Server -TrustAnySSLCert:$true -MonitoringContext:$true"
TimeWindowStart: 2015-03-18T07:10:07.0437501+02:00
TimeWindowEnd: 2015-03-18T07:23:27.0437500+02:00
TimeFirst: 2015-03-18T07:10:07.0437501+02:00
TimeLast: 2015-03-18T07:15:08.0145501+02:00
Count: 2
EventSourceName: MSExchange Monitoring OutlookConnectivity Internal

Hello,

I suggest we use Test Email Autoconfiguration to test the web services and Outlook connectivity.

[Check AutoConfiguration Status in Outlook]

===================================

a. While Outlook is running, click the CTRL key and then right-click the Outlook icon in the system tray and then select Test Email Autoconfiguration.

b. Confirm that your email address is in the address field, uncheck Use Guessmart and secure Guessmart authentication boxes. Then click the Test button.

c. Once it runs, check the Log tab and Results tab.

Thanks,

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I get an error  that Outlook AutoDiscover fails with error 0x80004005

After deleting extest_1eb30811639a4 and recreating it, everything is ok now.