Hi,
Unfortunately not - the ability to customise the party list look up view was a very welcome feature of CRM 2011.
You have to tell users to use the properties button to check which company the contacts belong to. The other approach is to search for the contact first and then create the activity from there, so the to field is already populated
Hth,
Scott
Scott Durow
Read my blog: www.develop1.net/public
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