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

[Jeff Bullard]

FWIW, I’m using an Exchange server and I have this same duplication 
issue on a regular basis in my Sent folder. Sometimes even more than two 
duplicates. I’ve just gotten used to it. The same duplicates are not 
there when I open Outlook or Apple Mail.

Jeffrey W Bullard PhD | FACerS | FWAS
Department of Materials Science and Engineering
Zachry Department of Civil and Environmental Engineering
Texas A&M University
3136 TAMU
College Station, Texas 77843

On 3 Mar 2026, at 8:23, Henry Seiden wrote:

> Luis,
>
> I have not experienced the issue on my Outlook account, but it is 
> infrequently used.
>
> Could this be caused by the settings on your server? IOW, can you see 
> the same problem using another client (Apple Mail or Outlook Mail or 
> web app)?
>
> Respectfully,
>
> Henry Seiden
> - -
> Techworks Pro Co.
> E: info<at>techworkspro<dot>com
> W: http://techworkspro.com
>
> On 3 Mar 2026, at 8:45, Luís Trevisan wrote:
>
>> 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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