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Need help with Exchange 2010 powershell syntax

I use a script that exports every mailbox to a PST for temporary backup reasons This currently works:

foreach ($i in (Get-Mailbox)) { New-MailboxExportRequest -Mailbox $i -ContentFilter {(Received -lt "04/21/2013")} -FilePath "\\filesserver\PST\$($i.Alias).pst" }


I am trying to figure out a way so I don't have to manually change the date in the received later than switch. Just testing, I was able to get this to work:

$date=get-date
$startdate=$date.addmonths(-3)
New-MailboxExportRequest -mailbox testuser-contentfilter "Received -gt '$startdate'" -filepath \\fileserver\PST\testuser.pst

So I tried this script:

$date=get-date
$startdate=$date.addmonths(-3)
foreach ($i in (Get-Mailbox)) { New-MailboxExportRequest -Mailbox $i -ContentFilter {(Received -lt '$startdate')} -FilePath "\\fileserver\ExmergePST\$($i.Alias).pst" }

I get this error:

The provided ContentFilter value is invalid. ContentFilter is invalid. The value "$startdate" could not be converted to
 type System.DateTime. --> The value "$startdate" could not be converted to type System.DateTime.
    + CategoryInfo          : InvalidArgument: ((Received -lt '$startdate'):String) [], ContentFilterInvalidPermanentE
   xception
    + FullyQualifiedErrorId : DD0301EC

 I've tried different syntax changing the delimeters with no success. Any help would be gretly appreciated. Thanks
0
Mark Lewis
Asked:
Mark Lewis
1 Solution
 
SubsunCommented:
Remove the single quote and try..
-ContentFilter {(Received -lt $startdate)}

Open in new window

Single quotes will not expand variables in PowerShell, double quotes will..
0
 
QlemoBatchelor, Developer and EE Topic AdvisorCommented:
Further, the difference between
  -ContentFilter {(Received -lt $startdate)}
and
  -ContentFilter {(Received -lt "$startdate")}
is that the latter will use a string representation of the date - which might lead to errors or unwanted behaviour (the rules for implicit type transformations are complex). The former allows to provide the var contents as DateTime object, which is best.
0
 
Mark LewisAuthor Commented:
That did the trick
0
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