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Contents of attachments are swapped after you save a message in Outlook

Symptoms
When you receive an email message that has multiple attachments that was created in Microsoft Outlook 2013 or Outlook 2010, you may receive one of the following error messages when you open an attachment.

Microsoft Word:

Word found unreadable content in <File Name>. Do you want to recover the contents of this document? If you trust the source of this document, click Yes. 

Microsoft Excel:

File <File Name>: file format is not valid.

Microsoft PowerPoint:

PowerPoint found a problem with content in <File Name>. PowerPoint can attempt to repair the presentation.

If you trust the source of this presentation, click Repair.

Note If the email contains attachments of only the same extension, you may notice that content is not in the correct file.
Cause
When multiple attachments are sent from Outlook 2013 or Outlook 2010, the attached files are renamed as other attached files. This is a known issue in Outlook that occurs when emails are auto-saved or saved with multiple attachments.
Resolution
To resolve this issue for Outlook 2013, install the January 12, 2016, update for Outlook 2013. For information about this update, click the following article to view it in the Microsoft Knowledge Base:

3114500 January 12, 2016, update for Outlook 2013 (KB3114500)  

To resolve this issue for Outlook 2010, install the October 13, 2015, update for Outlook 2010. For information about this update, click the following article to view it in the Microsoft Knowledge Base:

3085604 October 13, 2015, update for Outlook 2010 (KB3085604)

Outlook
Note This is a "FAST PUBLISH" article created directly from within the Microsoft support organization. The information contained herein is provided as-is in response to emerging issues. As a result of the speed in making it available, the materials may include typographical errors and may be revised at any time without notice. See Terms of Use for other considerations.
Properties

Article ID: 3095559 - Last Review: 01/20/2016 16:10:00 - Revision: 10.0

Microsoft Outlook 2013, Microsoft Outlook 2010

  • KB3095559
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