Powershell - trimming/splitting an object to export-csv - powershell

Question

I am trying to do a very simple task in powershell, I am trying to export a list of users from AD with certain properties. The problem is I need to trim the manager property to only include the name not the OUs etc. When I do this though I have to convert the object to a string which then I cant export to csv and cant get convertto-csv to work.
Get-ADUser gmclean -Properties * | Select sapid,EmailAddress,GivenName,Surname,department,costcenter,Title,Office,MobilePhone,StreetAddress,City,State,PostalCode,Country,manager
sapid : 111111
EmailAddress : test#123.ca
GivenName : Gray
Surname : Mclean
department : Edmonton Sales
costcenter : 213456
Title : Account manager
Office : EDM
MobilePhone : 123456789
StreetAddress : 123 street sw
City : Edmonton
State : AB
PostalCode : Z2Z Z2Z
Country : CA
manager : CN=Tea Ping,OU=Users,OU=EDM,OU=CA,OU=Countries,DC=test,DC=testinc,DC=ca
In this I am able trim the manager property and combine the variables. But I cant figure out how to make headers for all the properties.
$Everything = Get-ADUser gmclean -Properties * | Select sapid,EmailAddress,GivenName,Surname,department,costcenter,Title,Office,MobilePhone,StreetAddress,City,State,PostalCode,Country | ForEach-Object {$_.sapid,$_.EmailAddress,$_.GivenName,$_.Surname,$_.department,$_.costcenter,$_.Title,$_.Office,$_.MobilePhone,$_.StreetAddress,$_.City,$_.State,$_.PostalCode,$_.Country} | Out-string
$manager = Get-ADUser gmclean -Properties * | Select -Property manager | Out-string
$manager1 = $manager.split("="",")
$manager2 = $manager1[1]
$Everything1 = $Everything+$manager2
$Everything1
111111
test#123.ca
Gray
Mclean
Edmonton Sales
213456
Account manager
EDM
123456789
123 street sw
Edmonton
AB
Z2Z Z2Z
CA
Tea Ping
I am sure there is an easier way to do this but unfortunately I cant seem to figure it out.
Thanks,

Answer 1

Use a calculated property on your first pass through Select (all the way at the end):
Get-ADUser gmclean -Properties * | Select sapid,EmailAddress,GivenName,Surname,department,costcenter,Title,Office,MobilePhone,StreetAddress,City,State,PostalCode,Country,#{Name='manager';Expression={$_.manager.Split("=,")[2]}}