Have got a slightly strange one here, where there are 10 users running UCA 4.1, a mixture of Office 2007 and Office 2010, most can import contacts, but 3 can't. The option to import contacts is greyed out, and is not selectable. It's not limited to one version of Outlook, as two of them are 2010, and 1 is 2007.
Has anyone come across this before and found a solution to a slightly odd problem?