Update
The Exchange Server supportability matrix in the Microsoft TechNet documentation has now been updated to included Outlook versions and the Exchange Server version they are supported against. You can find it here.

Exchange Server 2007

The following Outlook client versions are fully supported by Exchange server 2007. Please bear in mind though, there’s a difference between what is supported and what might be compatible with Exchange 2007.

All of the Outlook versions listed below have been thoroughly tested by the Exchange Product group:

• Microsoft Office Outlook 2010 RTM and later
• Microsoft Office Outlook 2007 RTM and later
• Microsoft Office Outlook 2003 RTM and later
• Microsoft Office Outlook 2002

 
Note
When using Outlook 2003 or earlier to connect against an Exchange 2007 or 2010 organization, you must make sure a public folder database exist in the organization. This is because Outlook 2003 and earlier uses public folders to retrieve free/busy information and the offline address book (OAB). For more information see: Microsoft KB article: When you use Outlook with an Exchange 2007 mailbox, you cannot connect to Exchange 2007, and you receive an error message.

Exchange Server 2010

The following Outlook client versions are fully supported by Exchange server 2010. Please bear in mind there’s a difference between what is supported and what might be compatible with Exchange 2010.

All of the Outlook versions listed below have been thoroughly tested by the Exchange Product group:

• Microsoft Office Outlook 2010 RTM and later
• Microsoft Office Outlook 2007 RTM and later
• Microsoft Office Outlook 2003 Service Pack 2 and later

• Outlook connection issues with Exchange 2010 mailboxes because of the RPC encryption requirement

• In Outlook 2003, e-mail messages take a long time to send and receive when you use an Exchange 2010 mailbox

• An error occurs when an Exchange server 2003 user tries to open more than one delegate mailboxes of Exchange Server 2010 in Outlook 2003

• Office Outlook 2003 does not connect to two or more additional mailboxes in a mixed Exchange Server 2007 and Exchange Server 2010 environment

• Users who use Outlook 2003 cannot publish their free/busy data in Exchange Server 2010 or in Exchange Server 2007

• Error message when Outlook synchronizes an offline address book with Exchange Server 2007 and Exchange Server 2010: "0x8004010F"

• An error occurs when you try to synchronize the offline address list on an Exchange Server server while you are using Outlook 2003: "0x8004010F"

• Error message when Outlook 2003 users connect to an Exchange server by using RPC over HTTP: "Server Unavailable"
   
   

Exchange Server 2013

• Outlook 2013
• Outlook 2010 SP1 with November 2012 Cumulative Update ( available from http://support.microsoft.com/kb/2687623 )
• Outlook 2007 SP3 with November 2012 Cumulative Update ( available from http://support.microsoft.com/kb/2687404 )
• Entourage 2008 for Mac, Web Services Edition
• Outlook for Mac 2011

Reference link :
http://technet.microsoft.com/en-us/library/aa996719.aspx


 

Exchange Online (BPOS)

The following Outlook client versions are fully supported by Exchange Online (BPOS). Please bear in mind there’s a difference between what is supported and what might be compatible with Exchange 2010.

All of the Outlook versions listed below have been thoroughly tested by the Exchange Product group:  

• Microsoft Office Outlook 2010 RTM and later
• Microsoft Office Outlook 2007 RTM and later
• Microsoft Office Outlook 2003 Service Pack 2 and later (Free/busy and Offline Address Book support requires the Microsoft Exchange Online Connector for Office Outlook 2003 when using the non-dedicated Exchange Online solution) 

Note:
Exchange Online (BPOS) is based on Exchange Server 2007, but will be upgraded to Exchange 2010 later this calendar year (2010).

Exchange Online ( Office365) is already based in Exchange 2010.

See Also

• Concern: Is having Outlook 2003 clients going to prevent me from deploying Exchange 2010?

Other Languages

This article is also available the following languages:

• Versions de Outlook prise en charge par Exchange 2007, 2010, Online (fr-FR)