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If you’re using Outlook in a business environment and use SharePoint, you can save a file to a SharePoint library and share a link to the file. Save the file to a SharePoint server library
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Under the Image Attachments section, select Resize large images when I send this message. If you’re sending large image files you can automatically resize them to reduce their file size. Windows 7: Compress and uncompress files (zip files) The following articles describe how to compress and extract files for different Windows operating systems. When you compress, or zip, your file, it decreases its size, and it might decrease it enough to fit within the Outlook size limits for attachments. Tip: For detailed information about uploading files and creating a download link in OneDrive, go to Upload photos and files and Share files and folders and change permissions.
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