If you encrypt an Outlook message that contains voting buttons, message recipients won't be able to see them. That feature isn't supported at this time. Create an email message or reply to or forward a message that you received. On the Options tab, in the Tracking group, click Use Voting Buttons.

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When you select AutoSum, Excel automatically enters a formula (that uses the SUM function) to sum the numbers. Here’s an example. To add the January numbers in this Entertainment budget, select cell B7, the cell immediately below the column of numbers. Then select AutoSum.

Steps to convert .xls (macros workbooks) to .xlsm. Open the identified .xls workbook which contains macros. Navigate to File > Save As > Browse – which will open the below window. Make sure you are in the right path to save the workbook > Select Excel Macro-Enabled Workbook (*.xlsm) as shown below and select Save.