This is probably not a problem for most users but if you do get lots of files of a certain type – at work for instance – then you might want to change the default configuration and lower the risk setting of that specific file type. The following tip is also explaining how users can add new file types to the attachment manager and assign a risk level to them.

We need to open the Windows Registry because the custom settings have to be added to the Registry. Press Windows R, type regedit and hit enter. Now navigate to the Registry key HKEY_CURRENT_USER \Software \Microsoft \Windows \CurrentVersion \Policies. Right-click the Policies key and select New -> Key and name that key Associations.

Three DWORD values define additions to the risk settings of the Outlook Attachment Manager. They are:

HighRiskFileTypes
ModRiskFileTypes
LowRiskFileTypes

If you wanted to add some file types as low risks you would create a new DWORD and name it LowRiskFileTypes. The value of the key can be changed by double-clicking it. Now add file types to it and separate them with a “;”. To add .exe and .avi as a value you would add the following string in that field: “.exe;.avi”

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