If you are using a computer in a corporate environment, you may eventually run into an error message stating that VMOaddin Has Fired an Exception whenever you open Microsoft Outlook. Below, we will show you the cause and how to prevent (not hide) the message from returning. Fortunately, I have not received any reports that users cannot start Microsoft Outlook as well but users will always see the annoying error message when Microsoft Outlook is accessed until they apply my fix.

As you can see in the short video, the issue is being caused by the Cisco ViewMail for Outlook plugin and you are most likely encountering it as any version of Windows 7 has now reached its End of Life (EOL) so you have upgraded to Windows 8, Windows 8.1 and Windows 10 and as you are in a corporate environment and is required to protect your customer’s data and intellectual property from theft and ransomware.

With the plugin removed, you will now need to reinstall Windows Media Player if you have it disabled or install VLC Player and make it the default for your attachments containing the voice messages.

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Stephan Pringle

Chief Executive Officer at Sipylus

About The Author: Stephan Pringle is an Information Technology Specialist. He covers hardware and software and provides tips for you to troubleshoot and repair issues on your own. In his spare time, he writes articles about the State of New York on his Hackintosh and HackBook and that has helped him to become the top contributor of the New York City section of Yahoo! Answers.

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