A family of Microsoft spreadsheet software with tools for analyzing, charting, and communicating data.
Hello,
I am an independent adviser, and I am trying to help other users in Community with my experience in Microsoft products.
This can happen if the file was created and saved as an .XLS file in Excel 2016, 2010, 2007 or 2003 or if the file was saved in a format currently not supported on Android or Windows Mobile, such as .XLT or .XLTX.
To avoid this problem, open the password protected file in Excel on a Windows desktop PC or on a Mac, and then save it as a different Excel file type that works on Android or Windows Mobile, such as .XLSX. Once you've saved the file in the new file format you should be able to open it without a problem in Excel for Android or Excel Mobile for Windows.
For more information, go to Error when opening password-protected files on Android or Windows Mobile: https://support.office.com/en-us/article/error-...
Thanks.