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Eprs_Admin
Eprs_Admin asked
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Hi Experts,

I have a problem with one outlook client.
The clients said he has not send this emails.

We use Exchange Online and O365.

How to find out, who was the original sender ?
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Infrastructure Architect
CERTIFIED EXPERT
Commented:

Hello,


You need to use message trace and see if there was any email sent really from this account or not.


  
 Get-MessageTrace -SenderAddress john@contoso.com -StartDate 06/13/2018 -EndDate 06/15/2018


https://docs.microsoft.com/en-us/powershell/module/exchange/mail-flow/get-messagetrace?view=exchange-ps