share excel workbook with Outlook

When trying to share an Excel workbook (File>Share>Excel workbook), getting an error like: "This workbook is too large to send as an e-mail attachment".
1. It shows in any workbook even an empty one - so it is not really a size limitation.
2. When sending the saved file thru Outlook as an attachment, it also works well, so it is not Outlook's problem.
I'll appreciate it very much if someone can solve it.

https://answers.microsoft.com/en-us/...c-1abed5aee139