[MlMt] Duplicate messages in Sent Items (Exchange account)

Luís Trevisan luis at tangerina.net
Tue Mar 3 08:45:24 EST 2026


Hi all,

I'm experiencing duplicate messages in my Sent Items folder in Microsoft 
365 / Exchange account.

Setup details:
- Account type: Exchange / Outlook.com (Microsoft 365 corporate)
- The duplicates appear exclusively in the Sent Items folder
- The duplicate messages are identical
- No other folders are affected

Has anyone experienced this with an Exchange account and found a 
reliable fix?

Thank you in advance.
Luís
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