Office 365 mail attachment size limit

The attachment size limit for Office 365 email varies depending on the plan and the type of attachment. Here are the general attachment size limits for Office 365:

Office 365 Plans:

• Basic: 10 MB (megabytes)
• Business: 10 MB
• Business Premium: 10 MB
• Enterprise: 20 MB
• Enterprise E3/E5: 20 MB
• Office 365 Education: 10 MB

Note: These limits apply to individual attachments, not the total size of all attachments in a single email.

Additional Considerations:

• Zip files: If you try to attach a zip file larger than 10 MB (for Basic and Business plans) or 20 MB (for Enterprise plans), you'll receive an error message.
• Large files: If you need to send large files, consider using OneDrive or SharePoint to share them instead of attaching them to an email.
• Email clients: Some email clients, like Outlook, may have their own attachment size limits, which may be lower than the Office 365 limits.

Workarounds:

• Split large files: If you need to send a large file, consider splitting it into smaller files or using a file compression tool to reduce its size.
• Use cloud storage: As mentioned earlier, you can use OneDrive or SharePoint to share large files instead of attaching them to an email.
• Use a third-party service: There are several third-party services, like WeTransfer or Hightail, that allow you to send large files over the internet.

Remember to always check the attachment size limits for your specific Office 365 plan and consider alternative methods for sharing large files.