Excel for the web
Personal Microsoft account, or work or school account
- Open a workbook in Excel for the web.
- Select Home › Add-ins, then More Settings.
- In the Office Add-ins dialog, select Upload My Add-in.
- Browse to the manifest file and select Upload.
The upload is kept in your browser: after clearing its cache or switching browsers, upload the file again.
Microsoft 365 Excel on Windows
Desktop Excel with a Microsoft 365 subscription
- Select Home › Add-ins, then More Add-ins.
- In the Office Add-ins dialog, open the My Add-ins tab.
- Select Manage My Add-in, then Upload, and pick the manifest file.
Option missing? See troubleshooting below.
Excel on Mac
Microsoft 365 Excel for Mac
- In Finder, press Cmd+Shift+G and open ~/Library/Containers/com.microsoft.Excel/Data/Documents/wef (create it if missing).
- Copy the manifest file into this folder.
- Restart Excel and choose Nexell from the Home › Add-ins menu.
This is the route Microsoft documents for Mac; with a work account, central deployment is easier.