Android can't handle extensions imported from Outlook

My Galaxy S4 has most of the phone numbers imported from Outlook at work.
When I attempt to dial from contacts, the phone/Verizon combo interprets the X--- (extension number) as more digits, then Verizon tells me I am not authorized for international dialing--Thank God!
Of course, it might be nice if the Android system was not quite so stupid as to interpret the extension number as part of the phone number.
I don't see anywhere but here to let the Android developers know of the issue, so here goes.