Good Morning!

Following directions from a number of sites, I imported all of my contacts from Thunderbird into Outlook and they appear in my "People" directory, but when I start a new message and begin typing the name into the "To" field, the automatic match/lookup does not bring the possible matches up. Is there a way to make this happen other than sending an email to each person or might I have made some technical mistake in the mapping???

Thank-you!