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Create officeactivity-purviewsendasaudit.kql #21

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Create officeactivity-purviewsendasaudit.kql
jongross4 Mar 15, 2023
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Merge branch 'reprise99:main' into main
jongross4 Jan 8, 2024
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17 changes: 17 additions & 0 deletions Office 365/officeactivity-purviewsendasaudit.kql
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//Find messages where the SendAs or SendOnBehalfOf right was used
OfficeActivity 
| where Operation in ("SendAs", "SendOnBehalfOf")
//Extract the Item table to find the MessageId
| mv-expand todynamic(Item)
| extend InternetMessageId = tostring(Item.InternetMessageId)
//Trim extra rows created by mv-expand
| where isnotnull(InternetMessageId )
| project TimeGenerated, Operation, SendAsUserSmtp, UserId, Client_IPAddress, OfficeWorkload, RecordType, InternetMessageId,MailboxOwnerUPN
//inner join will filter EmailEvents to just those with the InternetMessageId
|join kind=inner (
EmailEvents
| extend tostring(InternetMessageId)
//Exposing the RecipientEmailAddress
| project EmailAction, RecipientEmailAddress, SenderMailFromAddress, Subject, InternetMessageId
) on InternetMessageId
|project TimeGenerated, Operation, EmailAction, SendAsUserSmtp, UserId, RecipientEmailAddress, Subject, MailboxOwnerUPN, SenderMailFromAddress