Activate Office - Microsoft Support
网页To use Microsoft 365 on your new device, you can activate Microsoft 365 as a 1-month trial of Microsoft 365 Family. You can also buy Microsoft 365 or a non-subscription …
Unlicensed Product and activation errors in Office
网页If Office activation fails, you'll see Unlicensed Product or Non-commercial use / Unlicensed Product in the title bar of your Office apps, and most features of Office are disabled. To restore all features of Office, you'll need to fix the problem that's causing activation to fail.
Add or remove add-ins in Excel - Microsoft Support
网页By default, add-ins are not immediately available in Excel, so you must first install and (in some cases) activate these add-ins so that you can use them. Some add-ins are built in to Excel, such as Solver and the Analysis ToolPak. Some other add-ins are available from the Download Center, and must first be downloaded and installed.
Install and set up Office on an iPhone or iPad - Microsoft Support
网页Set up individual Office apps on iPhone or iPad. STEP 1: On your iPhone or iPad, open any standalone mobile Office app (for example, Excel). Sign in with your Microsoft account, or Microsoft 365 work or school account and then tap Next.
View, manage, and install add-ins for Excel, PowerPoint, and Word ...
网页Select File > Get Add-ins. Alternatively, you can also view your add-ins directly from the Home tab by selecting Add-ins. You can directly install add-ins from this page or select More Add-ins to explore. In the Office Add-ins dialog, select My Add-ins tab.
Digital signatures and certificates - Microsoft Support
网页Signing certificate and certificate authority. Signing certificate To create a digital signature, you need a signing certificate, which proves identity. When you send a digitally-signed macro or document, you also send your certificate and public key.
Create a simple formula in Excel - Microsoft Support
网页Overview of formulas in Excel. SUM function. How to create simple formulas in Excel using AutoSum and the SUM function, along with the add, subtract, multiply, or divide values in your worksheet.
Using structured references with Excel tables - Microsoft Support
网页To include structured references in your formula, click the table cells you want to reference instead of typing their cell reference in the formula. Let’s use the following example data to enter a formula that automatically uses structured references to calculate the amount of a sales commission.
FIND, FINDB functions - Microsoft Support
网页If you don't want to do a case sensitive search or use wildcard characters, you can use SEARCH and SEARCHB. If find_text is "" (empty text), FIND matches the first character in the search string (that is, the character numbered start_num or 1). Find_text cannot contain any wildcard characters.
Excel functions (by category) - Microsoft Support
网页Worksheet functions are categorized by their functionality. Click a category to browse its functions. Or press Ctrl+F to find a function by typing the first few letters or a descriptive word. To get detailed information about a function, click its name in the first column.
Overview of Excel tables - Microsoft Support
网页Excel has some features that enable you to work efficiently with your table data: Using structured references Instead of using cell references, such as A1 and R1C1, you can use structured references that reference table names in a formula. For more information, see Using structured references with Excel tables.