This message is being generated by your Microsoft Outlook and not from the Treasury Software. The most common reasons for this is your antivirus software might be out of date or you have some outstanding Windows updates. If you have verified everything is up to date then you will need to talk to your IT Department to change the Programmatic Access Security setting in Outlook. Please pass the following link along to them as a reference.
Note: If you are a subscription client or have a traditional license with an active Support subscription, you can contact us with regards to using the Treasury Software-hosted email.