Ok but in this particular case the Security Log entries are actually a symptom of another problem. The root problem is that the user’s ip address is not being whitelisted in the backend of the site. Or another way to phrase this is normally you would not see these Security Log entries unless there is a problem with the user’s ip address being retrieved correctly. Since TinyMCE Advanced is working for you correctly since your ip address is being retrieved successfully then the problem is isolated to the user. What you need to ask this user is if they are using a VPN/Proxy (web based or computer application installed on the user’s computer) or internal network firewall when logging into the site.
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