Hi there,
it will stop the printing and it will not charge you. You can add additional volume add-on packs (500 print jobs each) to your standard pool of print jobs. Volume add-on packs are available through your regular channel.
To view your total print volume, monitor usage, and know when you need to purchase additional volume, visit the Usage and Reports page in the Universal Print portal.
https://learn.microsoft.com/en-us/universal-print/fundamentals/universal-print-license
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