Symptoms
When you try to save some edits to a Microsoft PowerPoint 2010 presentation that is located on a server, you receive the following error message:
Upload Failed This file is locked for editing by user_name.
Noteuser_name is the placeholder for your user name.
This problem occurs when the following conditions are true:
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The presentation is encrypted by a password.
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The presentation is created by another user.
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The presentation is still opened by the user.
Workaround
To work around this problem, follow these steps:
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Save a local copy of the presentation after you make the changes.
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Close the presentation.
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Ask the original author to close the presentation.
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Open the presentation again.
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Merge the changes with the presentation that is located on the server.
Status
Microsoft has confirmed that this is a problem in the Microsoft products that are listed in the "Applies to" section.