You can also share a file from OneDrive. This way, your recipients can collaborate on it in real time.
Note: The attachment size limit for OneDrive files is 2GB.
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At the bottom of a message or calendar event, select > Browse cloud locations.
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Choose the file or folder you want to share and select Next. Double-click folders to open them.
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Select Share as a OneDrive link.
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Choose if people can edit the file or only view it. Select and then select Change permissions