Using classic Outlook for Windows in business environments
When you have an email "popped out" (in it's own window) there is no "Move to" action. You will have to return to your mailbox list view. Where it will be on the main menu. Or create a Quick Action.
You can Vote for this Feature Request.
https://feedbackportal.microsoft.com/feedback/idea/999e4425-1a1a-f011-9d48-7c1e52ead3c1