How can I write to a shared workbook that is opened? I need to be able to write to an Excel doc that is opened by someone else, so that they can see updates in real time. However, if I save to a shared workbook, the next time it is saved or opened in Excel, I get a warning saying "This file is no longer shared". The only way to make it shared again is to close the file, reopen it, and set the shared properties again. But as soon as it is written to through the .net code, it becomes unshared again.
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