You can edit the Outlook items from within Outlook, just as you normally would, and the changes are automatically reflected in MindManager. You can also initiate the edit mode from within MindManager.
To edit an Outlook item topic in MindManager:
Right-click on the Outlook
item's icon on the topic - for example
for an Outlook appointment.
Select Open {item} in Microsoft Outlook (where {item} is the item type).
The item opens in Outlook so you can edit it.