Does anyone know any way to trap warnings?

I have a client with a large Exchange 2007 server (>1000 mailboxes). A simple "get-mailbox" generates a lot of warnings (mostly things like "...is not valid for Alias...". I'd like to capture those so we can have the help desk start fixing them, but I can't find a way to do it.

I/O redirection doesn't work (neither to stdlist or stderr). $warningPreference doesn't have any useful options (for this purpose).

What I'd like is -WarningVariable, but that doesn't exist.

Any ideas?

On second thoght, for what you need it might be easier to capture the session transcript (start-transcript) and then parse the information you need out of the transcript file.

Thanks! That's EXACTLY what I was looking for! At least until we get -WarningVariable and $warning.

For the specific purpose of identifying invalid Exchange 2007 recipients, you can look at the IsValid attribute. All mail recipients which generate a warning have the IsValid attribute set to False.

The following is all on one line and will generate a C:\InvalidAliasUsers.txt

 get-recipient -resultsize Unlimited | where {$_.Isvalid -ne $true} | select Name,Alias,RecipientType | export-csv C:\invalidAliasUsers.txt

-Alex

Thanks! That works great!