$ ./offlineimap.py -o -f INBOX
OfflineIMAP 7.1.1
  Licensed under the GNU GPL v2 or any later version (with an OpenSSL exception)
imaplib2 v2.57 (bundled), Python v2.7.13, OpenSSL 1.0.2k  26 Jan 2017
Account sync office:
 *** Processing account office
 Establishing connection to localhost:1143 (exchange)
 Establishing connection to localhost:2143 (local)
 Creating folder INBOX[local]
 Creating new Local Status db for local:INBOX
Folder INBOX [acc: office]:
 Syncing INBOX: IMAP -> MappedIMAP
 Copy message UID 36 (1/1539) exchange:INBOX -> local
 Copy message UID 46 (2/1539) exchange:INBOX -> local
Copy message from exchange:INBOX:
 imap
 ERROR: Copying message 36 [acc: office]
  Backend could not find uid for message, returned 0
Folder INBOX [acc: office]:
 Copy message UID 49 (3/1539) exchange:INBOX -> local
Thread 'Copy message from exchange:INBOX' terminated with exception:
Traceback (most recent call last):
  File "/cygdrive/c/Users/Administrator/offlineimap/offlineimap/threadutil.py", line 160, in run
    Thread.run(self)
  File "/usr/lib/python2.7/threading.py", line 754, in run
    self.__target(*self.__args, **self.__kwargs)
  File "/cygdrive/c/Users/Administrator/offlineimap/offlineimap/folder/Base.py", line 844, in copymessageto
    new_uid = dstfolder.savemessage(uid, message, flags, rtime)
  File "/cygdrive/c/Users/Administrator/offlineimap/offlineimap/folder/UIDMaps.py", line 271, in savemessage
    "returned %s"% newluid)
ValueError: Backend could not find uid for message, returned 0


Last 15 debug messages logged for Copy message from exchange:INBOX prior to exception:
: getmessageheader: headers = 'Received: from 

[...]
REMOVED-EMAIL-REMOVED 
[...]

imap: savemessage: header is: X-OfflineIMAP: 2591050257-5529301435
: addmessageheader: called to add X-OfflineIMAP: 2591050257-5529301435
: addmessageheader: headers end at position 1217
imap: __savemessage_searchforheader called for X-OfflineIMAP: 2591050257-5529301435
imap: __savemessage_searchforheader got initial matchinguids: ''
imap: __savemessage_searchforheader: UID SEARCH for message with header X-OfflineIMAP yielded no results
imap: savemessage: attempt to get new UID UID failed. Search headers manually.
imap: __savemessage_fetchheaders called for X-OfflineIMAP: 2591050257-5529301435
imap: savemessage: returning new UID 0
ERROR: Exceptions occurred during the run!
ERROR: Copying message 36 [acc: office]
  Backend could not find uid for message, returned 0

Traceback:
  File "/cygdrive/c/Users/Administrator/offlineimap/offlineimap/folder/Base.py", line 844, in copymessageto
    new_uid = dstfolder.savemessage(uid, message, flags, rtime)
  File "/cygdrive/c/Users/Administrator/offlineimap/offlineimap/folder/UIDMaps.py", line 271, in savemessage
    "returned %s"% newluid)