On the right-hand side of the screen, you will see the product activation information as displayed below. If you see the words Product Activated, activation was successful. If you don't get this result right away, close the office application you are running, and relaunch the application to check again. To activate Office on a Mac, see Activate Office for Mac. Mac activation issues. To troubleshoot Mac activation issues, see the 'Activation' tab on What to try if you can't install or activate Office for Mac. Install updates on a Mac. Microsoft AutoUpdate makes sure your copy of Office will always be up-to-date with the latest security fixes and improvements.

This tutorial explains the most common mistakes when making formulas in Excel, and how to fix a formula that is not calculating or not updating automatically. Can someone imagine using Microsoft Excel without formulas? I believe no one can. And hardly anything could compare to the frustration caused by Excel formulas stop working all of a sudden. When this happens, a bunch of questions immediately flash across your mind. Why is my Excel formula not calculating?

Why doesn't this formula update its value automatically? Is my Excel corrupt or is this due to some malicious virus?

And how do I get my Excel to calculate and update formulas automatically again? Don't worry, most likely your Excel is all right, and you will get all the answers in a moment. • - a formula returns an error or wrong result. • - a formula displays an old value after the values of the dependent cells have been updated. • - a cell displays a formula, not result. Excel formulas not working Symptoms: Excel formula not working correctly, it returns an error or a wrong result. This section provides a summary of the most common mistakes people make when creating formulas in Excel and solutions to fix them.

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Match all opening and closing parentheses in a formula As you know, the arguments of are entered within the parentheses. In complex formulas, you may need to enter more than one set of parentheses, one within another, to indicate the order in which the calculations should take place. When creating such a formula, be sure to pair the parentheses properly so that you always have a right parenthesis for every left parenthesis in your formula. Microsoft Excel displays the parentheses pairs in different colors as you enter them in a formula. If your formula is short of one or more parentheses, Excel displays an error message and suggests a correction to balance the pairs. Please see for more information.

Enter all required arguments in an Excel function All Excel functions have one or more required arguments. Some functions also have optional arguments, which are enclosed in [square brackets] in the formula's syntax.