Maximum value for SharePoint List unique ID

Hi BagsOfSand​,

There’s no explicit confirmation from Microsoft about the maximum value of the SharePoint List ID column. However, since the ID is of type Counter, which maps to a 32-bit signed integer, and SharePoint uses SQL Server as its backend (where int is 32-bit), the practical limit is 2,147,483,647. At a rate of 30,000 new items per day, it would take approximately 196 years to reach that limit—so there's no realistic risk of overflow.

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