New-RetentionPolicyTag "maildelete" -Type Inbox -Comment "Deleted Items are purged after 2 days" -RetentionEnabled $true -AgeLimitForRetention 2 -RetentionAction PermanentlyDelete
New-RetentionPolicy "dbmaildelete" -RetentionPolicyTagLinks "maildelete"
Set-Mailbox "dbmailbox" -RetentionPolicy "dbmaildelete"