Exchange Management Shell Error

I get the attached image error when I try to running a the following cmdlet:
Get-Mailbox -ResultSize Unlimited | Get-MailboxPermission -User "username" | ft identity, AccessRights

Capture.JPG
I have also run the following cmd to try and overcome this error with no luck:
Get-Item WSMAN:\localhost\Shell\MaxMemoryPershellMB 102400 -force

Any assistance would be great.
LVL 18
timgreen7077Exchange EngineerAsked:
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Joshua GrantomSenior Systems AdministratorCommented:
You cannot override the default size but you can change the formatting of your script to achieve the same results. It sends the requests individually to overcome the size limit

$mailboxes = get-mailbox -Resultsize unlimited
foreach($box in $mailboxes){
get-mailboxpermission -user "username" | ft identity,Accessrights
}

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timgreen7077Exchange EngineerAuthor Commented:
I ran the cmdlet you mentioned and get the following. See image:

Capture2.JPG
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Joshua GrantomSenior Systems AdministratorCommented:
My fault, -user should be -identity

$mailboxes = get-mailbox -Resultsize unlimited
foreach($box in $mailboxes){
get-mailboxpermission -identity "username" | ft identity,Accessrights
}

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0
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timgreen7077Exchange EngineerAuthor Commented:
I tried by entering -identity and it brings up page after page of the user's primary mailbox, but it never brings up any functional mailboxes the user has full manage access to granted via Exchange. When I enter:
get-mailboxpermission -user "username" | ft identity,Accessrights
it would bring up the mailboxes that the user has full manage access to along with his primary mailbox, but when I user
-user in the script you sent it asks for identity.
0
Joshua GrantomSenior Systems AdministratorCommented:
So what information are you wanting? Who has full access permissions for every mailbox? or all permissions for a single user?
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Joshua GrantomSenior Systems AdministratorCommented:
This will give you a list of who has full access permissions for each mailbox
$mailboxes = get-mailbox -Resultsize unlimited
foreach($box in $mailboxes){
Get-MailboxPermission | where { ($_.AccessRights -eq “FullAccess”) | ft identity,User
}

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Joshua GrantomSenior Systems AdministratorCommented:
Or if you are wanting to see what mailboxes a single user has full access to,

$mailboxes = get-mailbox -Resultsize unlimited
foreach($box in $mailboxes){
get-mailboxpermission -identity $_. -user "username" | ft identity,Accessrights
}

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timgreen7077Exchange EngineerAuthor Commented:
I'm trying to see what mailboxes a single user has full manage access to. I will try the one you sent and let you know. Thanks for your help and the quick responses.
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timgreen7077Exchange EngineerAuthor Commented:
I get the below error:
Cannot bind argument to parameter 'Identity' because it is null.
    + CategoryInfo          : InvalidData: (:) [Get-MailboxPermission], ParameterBindingValidationException
    + FullyQualifiedErrorId : ParameterArgumentValidationErrorNullNotAllowed,Get-MailboxPermission
    + PSComputerName        : houvxhc2.mustangeng.com
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Joshua GrantomSenior Systems AdministratorCommented:
Try this, I apologize, I no longer have an exchange environment to test on. We moved to google apps.

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

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Joshua GrantomSenior Systems AdministratorCommented:
This may work also

$mailboxes = Get-Mailbox -ResultSize Unlimited
foreach ($mailbox in $mailboxes) {
Get-MailboxPermission | where { ($_.User -like “username”) -and ($_.AccessRights -eq “FullAccess”) } | FT Identity,AccessRights
}

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footechCommented:
Here's a version of Joshua's code with correct syntax.
$mailboxes = Get-Mailbox -ResultSize Unlimited
foreach ($mailbox in $mailboxes)
{ Get-MailboxPermission -Identity $mailbox.Alias -User "username" | ft identity, AccessRights }

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Joshua GrantomSenior Systems AdministratorCommented:
thanks footech
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timgreen7077Exchange EngineerAuthor Commented:
Thank you gentlemen. Footech's correction solved the issue.
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