Exchange 2010 PowerShell Command to Delete a single email database

and before running this command, is it possible that i would know how much space i will gain after deleting that particular email address from the database?

use the search-mailbox command:

http://technet.microsoft.com/en-us/library/dd298173.aspx

use it maybe with the sent sintax on the search query. something like this:

Search-Mailbox -Identity "April Stewart" -SearchQuery 'sent:19/10/2010' -DeleteContent

do it first without the -deletecontent to check the output and then add the delete content.

use the get-mailboxstatistics to check the space:

http://technet.microsoft.com/en-us/library/bb124612.aspx

can you please clear out to me how can i define dates, lets say i want to delete email from user@hotmail.com starting from last week upto 5 years back.

If you want to delete a mail sent from xpto@hotmail.com just dont use the date. use the from: parameter. like from:xpto@hotmail.com

I dont think that you can use a date range. what you have to do is to configure the filter with a syntax. the best way to test the syntax is to build the command without the -deletecontent and check the output. test and then when the output is what you want just add the deletecontent

i tested it couple of times, but it keeps thinking and doesnt generate an output report.

use a simplier command and check if you get an output. like:

Search-Mailbox -Identity "April Stewart" -SearchQuery 'sent:19/10/2010'

it came up with an error :-(

The target mailbox or .pst file path is required.
    + CategoryInfo          : InvalidArgument: (:) [], ArgumentException
    + FullyQualifiedErrorId : 72CC2AE3