Permanently delete Outlook for Mac messages

deleteOutlookMessages.scpt

tell application "Microsoft Outlook"
	set theMessages to the selection
	permanently delete theMessages
end tell

Instructions:
1. Open the AppleScript Editor application found in /Applications/Utilities.
2. Copy the above four-line script and paste it into a blank AppleScript Editor window.
3. Select problem messages in Outlook for Mac.
4. Click the Run button in AppleScript Editor to execute the script and delete the messages.

Thank you but not working, I followed your script instruction and this error message existed:
error "Microsoft Outlook got an error: Can’t make missing value into type message." number -1700 from missing value to message

I also get a Script error: Microsoft Outlook got an error: Can’t make {outgoing message id 161304, outgoing message id 170700, outgoing message id 179073, outgoing message id 181751, outgoing message id 183661, outgoing message id 185209, outgoing message id 187285, outgoing message id 189011, outgoing message id 189296} into type message.

Try this:

tell application "Microsoft Outlook"
set theMessages to the selection
repeat with theItem in theMessages
permanently delete theItem
end repeat
end tell

Still didn't work. Thanks for trying

@NeilLowe
Thank you for posting that script. I got an account here specifically so that I could say "thank you" to you.
May I ask how did you come about it?
Thanks

I have accidentally discovered a way round the script error descibed above.

I have some 2012 emails stuck in a local sent items folder, and I also got an error with this script:
Microsoft Outlook got an error: Can’t make {outgoing message id 18809, outgoing message id 18795 ...... outgoing message id 17890, outgoing message id 17793} into type message.

I had a look in Outlook's Main identity folder, and for all the message ids listed that I checked there was no message file in Data Records/Messages, but there is a Message Source file. However, when opened, the source files were for 2014 emails.
This led me to think that, assuming the error message ids correspond to the ids in the Main Identity folder, the 'stuck' messages (or Outlook's index) may be corrupted in a way that makes them appear to have a different id. (Rebuilding the database doesn't help at all with this issue.)

When I tried testing the script on a single message to identify its id, the script worked!
Selecting even 2 messages caused the error, but I was able to delete all the problem messages one at a time with this script.

I've left all the info about messages and source above in case it helps anyone else get to the bottom of it, but if you get the error, try using the script on your emails one at a time.

Thank you sir. Worked perfectly.

Thanks, helped me too. Worked perfectly.
Still don't knot why these messages couldn't be deleted, but they are gone now :-)