Search-Mailbox command not recognized exchange 2010 sp1 powershell

Does anybody know why this command is not recognized in Exchange 2010 SP1:

Search-Mailbox -Identity "April Stewart" -SearchQuery 'Subject:"Your bank statement"' -Dele开发者_如何学GoteContent

This problem happens because your account is not a member of the Discovery Management role. Since your account does not have permission to perform searches, Powershell does not import the Search-Mailbox cmdlet.

In ECP, add the account to this role, then close and restart your Powershell session.

Are you running this from the Exchange Management Shell? If you're running from a regular powershell instance, did you remember to import the module? Run get-module to find the name of the exchange module, then run import-module <modulename> to make the commands available.

I used the following to fix the problem: http://www.techieshelp.com/delete-mail-from-multiple-mailboxes/

Create "Mailbox Import-Export Management" role group and grant yourself as a member. Rerun Search commands and it will work.

To create the role group we need to run the following: New-RoleGroup "Mailbox Import-Export Management" -Roles "Mailbox Import Export"

Adding a user can be done by running the following: Add-RoleGroupMember "Mailbox Import-Export Management" -Member

http://blogs.technet.com/b/nawar/archive/2010/06/24/permissions-to-import-or-export-mailbox-data-in-exchange-2010.aspx