Exchange Management Shell

I'm trying to export a list of mailboxes that a particular user has full manage access to. I'm trying to export this information to a csv file. The csv file is created but there is not information in the file.  If I run the cmd without the export-csv c:\name.csv then the information is populated to the screen of the shell, which is fine but I need this info in the csv. See below for the script I run. Any help would be great.

$mailboxes = Get-Mailbox -ResultSize Unlimited
foreach ($mailbox in $mailboxes){
Get-MailboxPermission -Identity $mailbox.Alias -User "username" | fl identity, AccessRights
}

The above script populates the shell screen just fine,  but if I run the following:
$mailboxes = Get-Mailbox -ResultSize Unlimited
foreach ($mailbox in $mailboxes){
Get-MailboxPermission -Identity $mailbox.Alias -User "username" | fl identity, AccessRights | export-csv c:\name.csv
}

Or if I change it to :
$mailboxes = Get-Mailbox -ResultSize Unlimited
foreach ($mailbox in $mailboxes){
Get-MailboxPermission -Identity $mailbox.Alias -User "username" | select identity, AccessRights | export-csv c:\name.csv
}
On the above I tried select and select-object and neither populates the csv file even though it creates it. Any idea how I can make this work and thanks in advance.
LVL 25
timgreen7077Exchange EngineerAsked:
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sirbountyCommented:
You should exclude the format-list, and just use export-csv.
Try this:
$mailboxes = Get-Mailbox -ResultSize Unlimited
foreach ($mailbox in $mailboxes){
  $perms += @(Get-MailboxPermission -Identity $mailbox.Alias -User "username")
}
$perms | select identity, accessrights | export-csv c:\name.csv

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