Require field update when record is saved

Hello,

I'm trying to force a field to require an update when the record is saved and I cant figure out if I need a rule or to change the properties of the field itself.

We have a contact record and it has a "Next Contact Date" for when the customer will need a followup.  I want to set that field that it HAS to be edited/updated anytime someone adds a note and saves the record.  I don't want someone to be able to save the record without updating that Next Contact Date field.

Any help  on this is appreciated.

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Marshall Azar
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