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Depending on what version you have, you can try this to test a cell.
Right-click on your text box and choose "Format Text Box."On the Protection tab, make sure "Locked" is checked. Uncheck "Lock Text."Then on the Properties tab, select "Don't move or size with cells," and click ok.
If that doesn't work on your version, please send the version and more detail of what
you are trying to accomplish, as well as what happens when you try to group the textbox
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