We have uploaded some excel files to a SharePoint Online library with IRM setting enabled. Recently we cannot open some of the files in the library. It said "You are not signed in to Office with an account that has permission to open this workbook. You may sign in a new account into Office that has permission or request permission from......"
When I click "Add Account", it shows MS login page
After I login my account, which is an owner account of this SharePoint site and library, it shows
May I know how to solve this issue? Thanks.