I have a list of people with some cell phone numbers

Some of the people are in the AD as existing users

Some of the people are not in the AD

Is there a way to import does people so that if they exist they will modify the users in the AD and if NOT they will create a new contact in the AD????

Thanks for your help

Unfortunately your post is off topic here, in the TechNet Site Feedback forum, because it is not Feedback about the TechNet Website or Subscription.  This is a standard response Ive written up in advance to help many people (thousands, really.) who post their question in this forum in error, but please dont ignore it.  The links I share below Ive collected to help you get right where you need to go with your issue.

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Moving to off topic.