Recent message.move issue in Outlook 365

[thejtluv]

Seems something may have changed around 5/12/25 with MS but not finding anyone else with the same issue. Can reproduce on a laptop and server using different accounts, both with access to single shared mailbox. This has been working for months and now has new behavior.

Shared mailbox > inbox receives email > move to processing subfolder > process > move to done subfolder

It is still working in a sense, but now the "move" leaves copy of email in inbox, another copy in progress and a third when it moves to done folder. Leaves a mess of duplicates when it tries to process on repeated time cycle.

Updated to latest current channel o365 (enterprise) with same results (cached mode, online didn't seem to make a difference).

Python 3.13 & pywin32 v310.

Partial code:

Global:

import win32com.client

outlook = win32com.client.Dispatch('Outlook.Application').GetNameSpace("MAPI")
inbox = outlook.Folders['SharedMailbox'].Folders['Inbox']
doneInbox = outlook.Folders['SharedMailbox'].Folders['Inbox'].Folders['DoneByPy']
failInbox = outlook.Folders['SharedMailbox'].Folders['Inbox'].Folders['Failed']
progressInbox = outlook.Folders['SharedMailbox'].Folders['Inbox'].Folders['In Progress']

Within the functions:

in case past fail and left in progress:

for message in list(progressInbox.Items):
message.Move(inbox)

if message exists on check, start processing:

for Message in list(inbox.Items):
Message.Move(progressInbox)

processing done, move to final resting place:

        for mess in list(progressInbox.Items):
           # do the process 
            mess.Move(doneInbox)

Thanks!
jt