Find AD-user by Email - powershell

Question

I'm trying to get users from active directory, who have a certain email address.
I've got a CSV-File, which contains the emails.
$data = import-csv -path .\are.csv -delimiter +
foreach($i in $data)
{
get-aduser -filter {UserPrincipalName -like '$i.email'}
}
My problem is, that I don't get any output. No error, no data. When I replace $i.email with one of the email addresses, I get the right user information for the one user. So hard coding works.
When I do:
foreach($i in $data)
{
$i.email
}
I get a list of all the emails.
What is wrong with the code?

Answer 1

Your variable is within single quotes thus doesn't get populated. You have to three options to fix that:
Use double quotes with a sub expression $():
UserPrincipalName -like "$($i.email)"
Just omit the quotes:
UserPrincipalName -like $i.email
And finally you could use a format string (even with single quotes):
UserPrincipalName -like ('{0}' -f $i.email)
Here is an example to demonstrate what actual value gets passed using the Write-Host cmdlet:
$data =
#'
email, id
myname#web.de, 1
'# | convertfrom-csv
foreach($i in $data)
{
Write-Host '$i.email' # This is your current approach
Write-Host "$($i.email)"
Write-Host $i.email
Write-Host ('{0}' -f $i.email)
}
Output:
$i.email # This is the output of your current approach
myname#web.de
myname#web.de
myname#web.de