Delete Content from 2008SP01 Mailbox

Question

Hi, I'm having an embarrassing amount of trouble trying to empty a few mailboxes I have on a 2008 Exchange server I run.  We use this primarily for stress testing a few email clients with the exchange server. After a few months some user accounts get
loaded with junk test mails I want to clear out.
I was going to use the PS command below to just clear out the junk emails since they all have the same subject line where "April Stewart" is obviously the user account I want to clear. 
Search-Mailbox -Identity "April Stewart" -SearchQuery 'Subject:"1111"' -DeleteContent (source)
However, I get the error "A parameter cannot be found that matches the name 'deletecontent'. From looking around, I figured I would just assign the role "Mailbox Import Export Role" to the Administrator account I log into the server with.
Unfortunately, I still seem to get the error message after I did that.  Did I assign the role incorrectly or mess up somewhere else? Thanks in advance.

Answer 1

Hi Joffroi,
According to your description and testing, I notice that you cannot use “DeleteContent” parameter in Serarch-Mailbox command.
I want to double confirm the version of Exchange Server.
If you want to delete message from user’s mailbox, you must assign the Mailbox Import Export role to the Organization Management role group, please run following command to double confirm:
Get-ManagamentRoleAssignment –Role “Mailbox Import Export” | FL Name,*Role*
Get-RuleGroup | Where {$_.Roles –Eq “Mailbox Import Export”} | Select Name
If Mailbox Import Export Role isn’t exist in Organization Management role group, please open ECP to add properly role. For your reference:
http://technet.microsoft.com/en-us/library/dd638202(v=exchg.141).aspx
Please note to restart the EMS to complete the change after finish add the role to role group.
More details about Search and delete messages, for your reference:
http://technet.microsoft.com/en-us/library/ff459253(v=exchg.150).aspx
Best Regards,
Allen Wang