Delete a specific email from all Users Mailboxes in O365.

Step 1 – Add your admin id to “Discovery Management” group

You can’t use Search-Mailbox cmd unless you have “Discovery Management” Group Rights, you can use EAC to Manage Role Group  and Grant permission to your account.

Step 2 - To use -DeleteContent switch your account requires Mailbox Import Export role Access you can follow the below steps for the same. 

·         Create a group Name Import and Export

 

New-RoleGroup “Import Export ” -Roles “Mailbox Import Export”

 

·         Add the admin ID to the role group.

 

Add-RoleGroupMember “Import Export” -Member “LABADMIN”

 

Step 3 – Run the below PowerShell to Remove the Messages

Below is the example of command I used where I had to delete email from the entire mailboxes in Organization from sender Example@gmail.com

To Query through all the mailboxes I created an array for all the mailboxes.

$mbx = Get-mailbox -resultsize Unlimited

Use below command to delete mail from all the mailboxes in organizations.

$mbx | Search-Mailbox -SearchQuery "from:Example@gmail.com" -TargetMailbox “AdminMailbox” -TargetFolder "DeleteReport" -DeleteContent –Force -LogLevel Full

Note:  By default –loglevel value is set to Basic, if you want full details or message delete use -loglevel full.

You can also use subject for SearchQuery

$mbx | Search-Mailbox -SearchQuery "Subject:This is Test Msg" -TargetMailbox “AdminMailbox” -TargetFolder "DeleteReport" -DeleteContent –Force -LogLevel Full