Can't open .xlsx files with Office 365 for Mac. - Microsoft Community
![Solved] 11 Solutions Fix Microsoft Excel Won't Open Issue - MiniTool](https://www.minitool.com/images/uploads/news/2020/12/excel-wont-open/excel-wont-open-2.png "Solved] 11 Solutions Fix Microsoft Excel Won't Open Issue - MiniTool")
Solved] 11 Solutions Fix Microsoft Excel Won't Open Issue - MiniTool
Excel cannot open the file 'ABCDE.xlsx' because the file format or file extension is not valid" when use "Reports - Run" ... "Save"
![✓Excel Cannot Open the File Because the Extension Is Not Valid [Windows & Mac Solutions]](https://www.easeus.com/images/en/data-recovery/drw-pro/excel-cannot-open-the-file-5.png "✓Excel Cannot Open the File Because the Extension Is Not Valid [Windows & Mac Solutions]")
✓Excel Cannot Open the File Because the Extension Is Not Valid [Windows & Mac Solutions]
The File Couldn't Open in Protected View? Easy Fixes Here!
Solved: Excel Cannot Open the File Because the Extension Is Not Valid
![✓Excel Cannot Open the File Because the Extension Is Not Valid [Windows & Mac Solutions]](https://www.easeus.com/images/en/data-recovery/drw-pro/excel-cannot-open-the-file-7.png "✓Excel Cannot Open the File Because the Extension Is Not Valid [Windows & Mac Solutions]")
✓Excel Cannot Open the File Because the Extension Is Not Valid [Windows & Mac Solutions]
![✓Excel Cannot Open the File Because the Extension Is Not Valid [Windows & Mac Solutions]](https://www.easeus.com/images/en/data-recovery/drw-pro/excel-cannot-open-the-file-2.png "✓Excel Cannot Open the File Because the Extension Is Not Valid [Windows & Mac Solutions]")
✓Excel Cannot Open the File Because the Extension Is Not Valid [Windows & Mac Solutions]
![✓Excel Cannot Open the File Because the Extension Is Not Valid [Windows & Mac Solutions]](https://www.easeus.com/images/en/data-recovery/drw-pro/excel-cannot-open-the-file.png "✓Excel Cannot Open the File Because the Extension Is Not Valid [Windows & Mac Solutions]")
✓Excel Cannot Open the File Because the Extension Is Not Valid [Windows & Mac Solutions]
Excel cannot open the file because the file format or extension is not valid
Can't open .xlsx file - Get Help - Metabase Discussion
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Solved] Excel Cannot Open the File Due to Invalid Extension
Excel cannot open the file because the file format or file extension is not valid SOLUTION - YouTube
![Fixed]Excel 2016 Won't Open XLS Files](https://www.stellarinfo.com/blog/wp-content/uploads/2020/07/Excel-2016-Won-39t-Open-XLS-Files.jpg "Fixed]Excel 2016 Won't Open XLS Files")
Fixed]Excel 2016 Won't Open XLS Files
Microsoft Excel cannot access the file on SharePoint - GCIT
![Excel Cannot Open the File Because the File Format or File Extension Is Not Valid [3 Ways to Fix]](https://www.isunshare.com/images/article/office/fixed-excel-cannot-open-the-file-because-the-file-format-or-file-extension-is-not-valid/excel-cannot-open-the-file.png "Excel Cannot Open the File Because the File Format or File Extension Is Not Valid [3 Ways to Fix]")
Excel Cannot Open the File Because the File Format or File Extension Is Not Valid [3 Ways to Fix]
![Solved] Excel Cannot Open the File Because the Extension Is Not Valid](https://www.stellarinfo.com/blog/wp-content/uploads/2021/06/excel-cannot-open-the-file-extension-not-valid-error-1.png "Solved] Excel Cannot Open the File Because the Extension Is Not Valid")
Solved] Excel Cannot Open the File Because the Extension Is Not Valid
Excel File Won't Open? 9 Fixes to Try
![Solved] 11 Solutions Fix Microsoft Excel Won't Open Issue - MiniTool](https://www.minitool.com/images/uploads/news/2020/12/excel-wont-open/excel-wont-open-10.png "Solved] 11 Solutions Fix Microsoft Excel Won't Open Issue - MiniTool")
Solved] 11 Solutions Fix Microsoft Excel Won't Open Issue - MiniTool
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Excel cannot be open the file 'filename.xlsx' because the file format or file extension is not valid - Microsoft Community Hub
An Ultimate Guide to Fix "Excel Cannot Open the Files" Issue
Excel Cannot Open the file 'New Microsoft Office Excel Worksheet....format of the file. - YouTube
![✓Excel Cannot Open the File Because the Extension Is Not Valid [Windows & Mac Solutions]](https://www.easeus.com/images/en/data-recovery/drw-pro/excel-cannot-open-the-file-1.png "✓Excel Cannot Open the File Because the Extension Is Not Valid [Windows & Mac Solutions]")
✓Excel Cannot Open the File Because the Extension Is Not Valid [Windows & Mac Solutions]
