Using Email Categories Within An Exchange Organization

Do you use the categories feature in Outlook to identify your mail?  If so, you might want that category information to be passed to others in your organization.  Starting with Exchange 2007, all categories get stripped from sent messages. Below is the PowerShell you can run to ensure that the category information stays put.

set-transportconfig -clearcategories $false

To turn it off again, change the flag to $true.