Formula for Excel Data Validation - Input Mask for Ten Digits

Hello, I would like to restrict entry to 10 numbers (absolute values) in column A (starting with A2) using the Data Validation option. I found a post from someone else for this, but it was for between 7 and 10 numbers and when I tried to edit the formula it would not cooperate. It sounds like a simple thing, but I cannot figure it out. Any help would be greatly appreciated!

Hi, try Data Validation option nonstandard, formula

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Regards.

This is perfect! Thank you so much!