I'm busy testing it for the first time, enabled the integration for my extension, installed the plugin set it up in my Windows 3CX client and called myself from another phone which results in this error:
Please provide more detail as to the version of 3CX you are using, 3CX client version, plug-in version and environment (Windows version, .NET Framework etc).
Sorry for the delay, this was my mistake, I had ticked the “Enable Journaling” option (only works for Microsoft Outlook 2010) while I am using Outlook 2013