Enterprise Vault Search, Outlook Add-In Requirements

Hi,

Are there any Outlook Add-In requirements for Enterprise Vault Search. Same user on 2 machines, with 10 and 11 EV outlook add-ins, get the old and the new search respectively when opening "Search Vaults" from Outlook.

I can't see anything in the compatability guide about EVS and Outlook Add-Ins. Is this documented anywhere?

My setup is EV11.0.1 HF2 on Windows 2008 R2, Exchange 2010, Outlook 2013 SP1 on Windows 7 SP1, with the 10.0.4 and 11.0.1 Outlook Add-in.

Thanks