Shared Excel 2013 workbooks support edits from multiple users at the same time over a network, but lack many features of regular workbooks, such as inserting pictures or adding new sheets. Whether you want to disconnect all other users, turning a shared workbook back to a regular workbook, or remove a single user from the file, use the Share Workbook window.
Step 1

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Open the Review tab and click Share Workbook in the Changes section.
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Step 2

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Select someone from the list of active users and click Remove User to remove a specific user. Click OK to close the window after removing as many users as you want.
Step 3

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Uncheck Allow Changes... and click OK to stop sharing the file and remove all other users.
Step 4

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Choose Yes to confirm.