When you send a meeting request that contains an attachment in Microsoft Outlook, you receive the following error message.
The operation failed.
This issue may occur because of a third-party .dll file that's installed on the computer. Microsoft product support teams have seen this issue occur in some cases with the Qipcap.dll file. This file is associated with the Websense program.
NoteThe presence of this third-party .dll file does not necessarily mean that you will experience these symptoms. There may be other causes of these symptoms. This article is only intended to help you identify possible causes of this issue when you are running Outlook.
To fix this issue, install the October 13, 2015, update for Outlook 2013 or Outlook 2010. For information about these updates, click the following article numbers to view the article in the Microsoft Knowledge Base:
3085579 October 13, 2015, update for Outlook 2013 (KB3085579)
3085604 October 13, 2015, update for Outlook 2010 (KB3085604)
If you can't install the update that's mentioned in the "Resolution" section to fix this issue, you can work around the issue by either disabling or uninstalling the third-party application. Use the Programs and Features item in Control Panel to uninstall the application.
If you can't locate the program through Control Panel, check the program's installation folder for an "uninstall" program. By default, the Qipcap.dll file is located in the C:\Windows\system32 or C:\Windows\SysWOW64 directory.
For more assistance, contact the vendor of the third-party application.
Third-party information disclaimer
The third-party products that this article discusses are manufactured by companies that are independent of Microsoft. Microsoft makes no warranty, implied or otherwise, about the performance or reliability of these products.
If you review the Microsoft Office Alerts log, you see an event that resembles the following:
The operation failed
To review the Microsoft Office Alerts log, follow these steps:
In Control Panel, open Administrative Tools.
Double-click Event Viewer.
In the navigation pane, select Microsoft Office Alerts under Applications and Services Logs.