Microsoft has increased security protections around older Office file formats, often called legacy files. As a result, beginning September 18th, some older Word, Excel, and PowerPoint files may open in Protected View, have editing restrictions, or require conversion to a modern file format before they can be edited. Microsoft is making this change because many legacy file formats are more vulnerable to security threats, including memory-corruption vulnerabilities that can potentially be exploited by malicious files.
How do I know if I have a legacy file?
Legacy Office files often have older file extensions instead of newer extensions ending in “x”
- Word: .doc
- Excel: .xls
- PowerPoint: .ppt
You can see the file extension in File Explorer, OneDrive, or SharePoint by looking at the file name (for example, Budget.xls or Report.doc). When opened in Microsoft 365, you may also see "Compatibility Mode" displayed in the title bar, which indicates the file is using an older format.
You may also receive the following prompt when attempting to save a legacy file. If this popup appears, select OK and follow the procedure below to save in an updated file type.
What does this mean for you?
- If you are actively editing a legacy Office file, please save it in the current Microsoft format:
- Word: .docx
- Excel: .xlsx
- PowerPoint: .pptx
- If a legacy file is being retained for reference and does not require editing, it may remain in its current format.
- There is no need to convert all files immediately. We recommend updating files as you work with them. You can delete the legacy files once you have the new file format.
How do I save a file in the new format?
- Open the file.
- Select File > Save As.
- Choose where you want to save the file.
- Select the current file type (.docx,.xlsx, or.pptx).
- Click Save.
For additional guidance on file conversion in Canvas, contact CETL for assistance.If you have questions or need assistance converting files, please contact the LTS Help Desk at helpdesk@uwec.edu of 715-836-5711.