Powershell/script issue

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Mayo, Bill

May 18, 2021, 10:28:40 AM5/18/21
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I have a script that gets mailbox attributes and puts it in a custom object for account auditing purposes. The script runs fine from an Exchange server. I am trying to adapt it to be run from a different location, where Exchange isn’t installed, using an imported session. Generally speaking, I have had no issues with doing a variety of things from an imported session. However, I am having an issue with a particular line in this script:


$Mailboxes = Get-Mailbox -RecipientTypeDetails RoomMailbox -ResultSize:Unlimited | Select-Object Alias, DisplayName, @{label="LastLogonTime";expression={(Get-MailboxStatistics $_).LastLogonTime}}, @{label="ItemCount";expression={(Get-MailboxStatistics $_).ItemCount}}


The issue is that the LastLogonTime and ItemCount do not get populated when run remotely (they are populated when run locally on the Exchange server). Running the individual “Get-MailboxStatistics” commands from the remote session returns the expected values—it just doesn’t seem to be able to put it together in one line.


Is there some limitation with the imported session or is there something else that I am missing here? Any pointers would be appreciated.



Bill Mayo


Michael B. Smith

May 18, 2021, 10:35:34 AM5/18/21
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Imported sessions require data to be dual-serialized (this happens all the time in Exchange online sessions, which is where I first ran into it).


Often the rehydrated (deserialized) variables have changed type (e.g., a [DateTime] becomes a [String]). I expect that is what happened to you below, with your $_ - the data types are no longer the same. Use a more constrained variable instead, like $_.distinguishedName.

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Mayo, Bill

May 18, 2021, 10:39:59 AM5/18/21
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Making that changed fixed the issue. Thanks so much for the quick response.

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