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losing e-mails office 365
Can someone help we've got a bizzaare problem with outlook 2016 and office 365.
E-mails sent not saving on sent items folder.
You can try several things:
1. Disable and re-enable Cached Mode. In Outlook go to File -> Account settings -> Change account, and uncheck "Use Cached Exchange Mode". Close Outlook, then open it again and check the option "Use Cached Exchange Mode" again.
2. Go to File -> Options -> Mail -> Save messages, and verify "Save copies of messages in the Sent items Folder" is checked, and the option "When replying to a message..." is not checked
Is it a shared mailbox, perhaps?