Outlook 2010 can not add account in Exchange 2010 enviroement

When i try to add account with Outlook 2010/2007.
It prompt:
The name cannot be resolved. The connection to Microsoft Exchange is unavailable. Outlook must be online or connected to complete this action.

I can access that account by webmail, iPhone, POP and SMTP.
Only failed in Outlook.

Any idea?
Thank you.
Outlook-Error.jpg
dickchanAsked:
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Vipin VasudevanInfrastructure SpecialistCommented:
This might be due to RPC encryption enabled in Exchange 2010 by deafult....

Normally Outlook 2010 allow this some times I have noticed issue with some


Please refer this article to disabble this feature...   http://support.microsoft.com/kb/2006508
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withtuCommented:
Do you type the correct name of this mailbox? For example Joshua Avlis? In addition, please ensure that you have typed the correct exchange server's name, which is the internal FQDN name. If all of those info is correct, use this tool to check the connectivity of exchange 2010: https://www.testexchangeconnectivity.com/
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dickchanAuthor Commented:
User name and server information should be correct.
I used old account for testing. The result is same.

Where can i find & change the RPC encryption settings from Exchange server?
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Vipin VasudevanInfrastructure SpecialistCommented:
You have to use Exchangme Managment Shell to achive this task dude...

on you exchange server open EMS

and key in Set-RpcClientAccess –Server "Exchange_server_name" –EncryptionRequired $False

where Excahnge_server_name is your CAS server name, if any
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Suliman Abu KharroubIT Consultant Commented:
please check DNS ip address on the client machine does it points to a correct DNS server ?

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