Hi @Christopher Vargo ,
According to my research, this particular rule is called a client-side rule. I'm sorry that your client rules don't work in the new outlook. Client rules are rules that only run on your local computer, not on the mail server. They may depend on specific settings or features that are not available or compatible with the new Outlook interface.
The new Outlook is not yet complete and some options may not be available or work as expected. You can switch back to the classic Outlook at any time by clicking the toggle button in the top right corner of the window.
Many features of our current products are designed and upgraded based on customers’ feedback. With requirements like this increase, the problem may well be released in the future. It's suggested that you submit suggestions via this link
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