This annoying warning message has started coming up for our users in Outlook within the Dynamics 365 Add-in when they track emails.
Once it has come up, a new copy of the message comes up every time you track an email, making the tracking window smaller until you clear the messages.
There doesn't seem to be any information out there on where this message comes from, the only information I have found relates to Safe Attachments Policy but we are not using Microsoft Defender Premium, so this cannot be the cause.
It also happens in 'old outlook', 'new outlook' and Outlook on the Web, so it is not related to a particular computer or App version.
Any help much appreciated.