Run this one liner command to disable client access to a mailbox
Set-CASMailbox “testmbox” -EwsEnabled $false -ActiveSyncEnabled $false -MAPIEnabled $false -OWAEnabled $false -ImapEnabled $false -PopEnabled $false
Disable single item recovery and remove the mailbox from litigation hold.
Set-Mailbox “Mickey Mouse” -SingleItemRecoveryEnabled $false -LitigationHoldEnabled $false
Copy items from the Recoverable Items folder to a folder in the Discovery Search Mailbox and delete the contents from the source mailbox.
Search-Mailbox -Identity “testmbox” -SearchDumpsterOnly -TargetMailbox “Discovery Search Mailbox” -TargetFolder “GurinderSingh-RecoverableItems” -DeleteContent
If you need to delete only messages that match specified conditions, use the SearchQuery parameter to specify the conditions. This example deletes messages that have the string “card statement” in the Subject field.
Search-Mailbox -Identity “testmbox” -SearchQuery “Subject:’card statement'” -SearchDumpsterOnly -TargetMailbox “Discovery Search Mailbox” -TargetFolder “testmbox-RecoverableItems” -DeleteContent
Ex-Shell 