Describes the cause and action for error messages.
Error Message(English)：
office 365 excel cannot save
You receive an error message when you try to save a file in Excel
https://support.microsoft.com/en-us/help/214073/you-receive-an-error-message-when-you-try-to-save-a-・・・
Office files may not save if Files On-Demand is enabled - OneDrive
https://support.office.com/en-gb/article/office-files-may-not-save-if-files-on-demand-is-enabled-46f・・・
Solved: Cannot Save Excel file on Windows 10 - Dropbox Community ...
https://www.dropboxforum.com/t5/Business-Admins-support/Cannot-Save-Excel-file/td-p/272694
Unable to save any docs (excel or word) | Tom's Guide Forum
https://forums.tomsguide.com/threads/unable-to-save-any-docs-excel-or-word.144243/
Fix for Microsoft Excel cannot open or save any more documents ...
https://www.youtube.com/watch?v=5eN6pRVL5_M
https://www.youtube.com/watch?v=5eN6pRVL5_M
could not be saved sharing violation EXCEL SOLVED - YouTube
https://www.youtube.com/watch?v=P9lRCKCJP14
https://www.youtube.com/watch?v=P9lRCKCJP14
How to Fix Excel File Error 'The document cannot be saved'
https://recoverit.wondershare.com/office-file-recovery/how-to-fix-excel-document-cannot-be-saved-err・・・