A topically conversation today - Outlook on the Enterprise Vault server. As everyone knows Outlook is needed on the Enterprise Vault server in order to perform mailbox archiving. For quite some time Outlook 2003 was the de-facto on the server, but that has progressed to Outlook 2007 with Service Pack 3 and some hotfixes.
The question that gets asked a lot is whether Outlook 2010 or Outlook 2013 can be used.
The answer is - No.
They are not supported on the server.
As with all these sorts of things the bible for knowing what is supported, and in which combinations is the Compatibility List, and in this particular case, refer to this section: