Hi Ian,
In which format did you back up your contacts in Office 2010? Generally, you can back up your contacts in .csv or .pst format. If your backup contacts are in one of these two formats, you can easily restore them in Outlook 2016 via
File > Open & Export > Import / Export >
Import from another program or file...


Hope this helps.
Regards,
Steve Fan
Please remember to mark the replies as answers if they helped. If you have feedback for TechNet Subscriber Support, contact
tnsf@microsoft.com.

Click
here to learn more. Visit the dedicated
forum to share, explore and talk to experts about Microsoft Teams.