A 'fascinating' Microsoft Excel security flaw teams up spreadsheets and Copilot Agent to steal data

There's more than one way to skin an Excel table, and this one abuses Copilot.
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Stop using so many tabs in Microsoft Excel

Fragmenting your data across many Excel tabs is a common habit that silently kills file performance, introduces hidden errors, and turns reporting into a tedious chore. Here's why you need to stop.