We have moved over to M365 and we have issues with the Undo function both keybind and coded function in Thunderbird. Outlook it works just fine, but in Thunderbird it seems to not work and the function is just greyed out. Scenario: Moves the mail from Folder Inbox to Folder Courier, but realize that it needs to be in Folder Content, so wish to move it back with Ctrl + Z or the Undo function in the Edit tab. Function doesn't work. Is this how it is because of server syncing, or is there something we can do as permission to our employees? Thank you in advance.