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All / most of my users are getting a pop up that Callercheck exploit was prevented in Outlook

Phil Lewis

We are using Outlook 2016 (365) and getting widespread 'CallerCheck exploit prevented in Microsoft Outlook.'

How do I determine if this is outlook or a 3rd party plugin.  We all have one plugin in particular, from Newforma.

Please advise!

Thanks,

Phil



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    We have one user who installed Security Update for Microsoft Windows (KB4056890) and Update for Microsoft Windows (KB4049411) last night and he can no longer start Outlook because he is now getting exactly the same error -  'CallerCheck' exploit prevented in Microsoft Outlook.

    We don't have the Newforma plugin but we do all have a third party plugin.

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    We have one user who installed Security Update for Microsoft Windows (KB4056890) and Update for Microsoft Windows (KB4049411) last night and he can no longer start Outlook because he is now getting exactly the same error -  'CallerCheck' exploit prevented in Microsoft Outlook.

    We don't have the Newforma plugin but we do all have a third party plugin.

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