Delete specific email meesage from a server / mailbox database with Exchange shell

We should firstly ensure that the user has necessary permissions by assigning thier security group the relvent role:

New-ManagementRoleAssignment -Name "Import Export Mailbox Admins" -SecurityGroup "*SecurityGroupName*" -Role "Mailbox Import Export"

To find an email sent by a user to a numbero users on a specific date / subject we can use:

Get-Mailbox -Server  ExchangeServer | Search-Mailbox -SearchQuery 'Subject:"*My Subject*" AND From:"Joe Bloggs" AND Sent:"11/13/2015"' -targetfolder "Inbox" -targetMailbox "Admin Email" -logonly -loglevel full > C:\temp\results.txt

* The 'targetMailbox' command simply states where the results will be sent too.

Once you have verified from the output that the relevent (and only relevent!) mail items are there we can then use the '-deletecontent' switch to then delete the messages:

** Note: Within the output you should be looking for nodes with something like 'ResultItemsCount' : >0 **

Get-Mailbox -Server  ExchangeServer | Search-Mailbox -SearchQuery 'Subject:"*My Subject*" AND From:"Joe Bloggs" AND Sent:"11/13/2015"' -targetfolder "Inbox" -logonly -loglevel full -deletecontent > C:\temp\results.txt

OR alternatively we can leave the 'targetMailbox' switch in which will save all deleted messages to a mailbox before deleting them:

Get-Mailbox -Server  ExchangeServer | Search-Mailbox -SearchQuery 'Subject:"*My Subject*" AND From:"Joe Bloggs" AND Sent:"11/13/2015"' -targetfolder "Inbox" -targetMailbox "Admin Email" -logonly -loglevel full -deletecontent > C:\temp\results.txt