I have this small piece of script to create a dynamicdistributionlist and set one of the custom fields
CSV file is
title,year
Group1,1


$GroupFile = import-csv .\groups.csv -OutVariable string
foreach ($Group in $GroupFile)
{
 $GroupName = $group.title
 $GroupYear = $group.year
 Echo "Adding $GroupName"
 New-DynamicDistributionGroup -Name $GroupName -RecipientFilter{(Recipienttype -eq "UserMailbox") -and (Title -eq $GroupName)}
 Set-DynamicdistributionGroup $GroupName -CustomAttribute1 $GroupYear
 }

As you can see below the $GroupName variable is not being passed for the Title filter

((RecipientType -eq 'UserMailbox' -and -not(Title -ne $null)) -and -not(Name -
like 'SystemMailbox{*') -and -not(Name -like 'CAS_{*') -and -not(RecipientType
DetailsValue -eq 'MailboxPlan') -and -not(RecipientTypeDetailsValue -eq 'Arbit
rationMailbox'))

Any suggentions?
Thanks
Kieran

Found the answer
New-DynamicDistributionGroup -Name $GroupName -RecipientFilter{(Recipienttype -eq "UserMailbox") -and (Title -eq $GroupName)}
Changed to
New-DynamicDistributionGroup -Name $GroupName -RecipientFilter"Recipienttype -eq 'UserMailbox' -and Title -eq '$GroupName'"