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View, manage, and install add-ins for Excel, PowerPoint, and Word
Add or remove add-ins in Excel - Microsoft Support
Use add-ins in Outlook - Microsoft Support
Start using your Office Add-in - Microsoft Support
Find my Office Add-in - Microsoft Support
Get an Office Add-in for Excel - Microsoft Support
Insert Office Add-ins into Excel for the web - Microsoft Support
Add or load a PowerPoint add-in - Microsoft Support
Get an Office Add-in for Excel - Microsoft Support
Turn an add-in on in Outlook for Windows - Microsoft Support
Add or remove add-ins in Excel - Microsoft Support