I’m wondering if it’s possible to have one column display a running count of the number of people in a people column?

Use-case: I’m creating a Professional Development SharePoint site and a List to track what trainings are available.  I have a column called Maximum Attendees, and I need a column to count from the Registered Attendees so I can make another column to count how many seats are left.  I’ve tried a Calculated Value, but People columns aren’t available to use. 

​I’m wondering if it’s possible to have one column display a running count of the number of people in a people column? Use-case: I’m creating a Professional Development SharePoint site and a List to track what trainings are available.  I have a column called Maximum Attendees, and I need a column to count from the Registered Attendees so I can make another column to count how many seats are left.  I’ve tried a Calculated Value, but People columns aren’t available to use.    Read More

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