How to completely delete emails from Exchange server?

Question

PowerShell

Good afternoon
Please help, you need to completely delete the letter from the Exchange server (we use office365)
Everything was done according to the MS manuals
1. Removed via PS from mailboxes
Search-Mailbox -Identity "..." -SearchQuery 'Subject:"...' - DeleteContent
2. Removed from
Search-Mailbox recoverable folder ... -SearchQuery size>0 -SearchDumpsterOnly -DeleteContent The
mailbox is clean, BUT
If you open a case through the security center and search for data, then All deleted letters are located.
and how to remove them ?
Thanks

Answer 1

They are saved for a certain time so that they can be restored.
In your Microsoft 365 admin center, the menu on the left will be "Support - Create a Service Request". Ask them a question.