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What happens when my auto-number field reaches a number that exceeds the specified digits?

Knowledge Article Number 000214175
Description If I specify my Auto-Number Format as A-{0000}, what number will be assigned to the record following A-9999?
Resolution The number portion of the Auto-Number format will expand an extra digit(s) to accommodate for large numbers once the sequence has reached the capacity of the specified digits.  For this example, the next record will be assigned A-10000.  Then A-10001, A-10002, etc.

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