I wrote an Outlook COM Add-In that adds new custom toolbar to Outlook. This toolbar has a button to move selected messages to "Deleted Items" folder. It's kind of Outlook "Delete" button. However, for some unknown reason, when I clicked the button to move selected messages to "Deleted Items" folder, they still stayed in the current folder. But, once I moved to some other folder, and came back to it, all the selected messages were successfully moved to "Deleted Items" folder.
I don't understand why there is such delay. Does it have something to do with Outlook settings, or Exchange server settings? Or, simply there is a bug in my code. But, my logs show no error. I am using "IMAPIFolder::CopyMessages" to move messages.