[Exchange-Online][EWS][C#][Windows 7] Move email based on their categories

Hello,

I'd like to move emails in the Inbox to a separate folder based on their category.

I'm using Microsoft.Exchange.WebServices (15.0.0.0) to connect to an ExchangeVersion.Exchange2013_SP1 instance. I'm using C# in VS2013 and the .NET 4 framework but can take examples from other versions if they exist.

I've tried using SearchFilter without much success through ExchangeService.FindItems, but the 'Categories' property seems to be tricky to configure.

Does anyone have an example of how I can select/move emails from a folder based on their category membership?

Thanks,

Mike