validation help

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Apr 10, 2011
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hi ive looked all over for this but can find what im looking for :(

cell b1 has a count if forumula =COUNTIF(B2:B17,"ah") i need a validation so that cell b1 does not go over 10 and if it deos give a warning. cell a1 has Conditional Formatting but the department still book holidays above the level so i need a warning and help with the validation on cell b1 with whole number between 1-10 but it still lets you go over

any help on this would be great
 
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