Powershell - CSV - AD Attribute Update - powershell

Question

I'm trying to get AD attributes updated with information from my payroll system. I have a good dump of employee information, and can get most things updated, but I'm having some small problems that hopefully someone much better with Powershell than I can assist with.
--- UpdateInfo.ps1 ---
Import-Module ActiveDirectory
$Users=Import-Csv C:\info_update.csv
foreach($u in $Users)
{
Get-ADUser -Filter "employeeID -eq '$($u.employeeID)'" -properties * | set-aduser -replace #{title="$($u.title)";extensionAttribute1="$($u.title)";givenName="$($u.givenName)";initials="$($u.initials)";middleName="$($u.middleName)";sn="$($u.sn)";physicalDeliveryOfficeName="$($u.physicalDeliveryOfficeName)";streetAddress="$($u.streetAddress)";l="$($u.l)";st="$($u.st)";co="$($u.co)";countryCode="$($u.countryCode)";c="$($u.c)";postalCode="$($u.postalCode)";department="$($u.department)"}
}
--- info_update.csv ---
employeeID,givenName,initials,middleName,sn,name,title,physicalDeliveryOfficeName,streetAddress,l,st,co,countryCode,c,postalCode,department,manager
"111","Smith","Q","Quincy","John","Smith, John Q.","Tech II","Springfield, IL","800 E Monroe St.","Springfield","IL","United States","840","US","62701","IT","540"
Two questions:
I can't get the 'name' field to update. I thought that it was because of the space, but the physicaldeliveryofficename has a space, too...and it's working fine.
I need to do a lookup for the manager ID (last column), return the DN of the manager, and use that to update the manager attribute.
If anyone can help, I would greatly appreciate it. I feel like I'm really close, but I'm overlooking something.
Thanks!
---UPDATE---
Thanks to #TheMadTechnician
Here's the final answer.
Import-Module ActiveDirectory
$Users=Import-Csv C:\Job_titles.csv
foreach($u in $Users)
{
$Mgr = Get-ADUser -Filter "employeeID -eq '$($u.manager)'" | Select -ExpandProperty DistinguishedName
Get-ADUser -Filter "employeeID -eq '$($u.employeeID)'" -properties * | set-aduser -replace #{title="$($u.title)";extensionAttribute1="$($u.title)";givenName="$($u.givenName)";displayName="$($u.name)";initials="$($u.initials)";middleName="$($u.middleName)";sn="$($u.sn)";physicalDeliveryOfficeName="$($u.physicalDeliveryOfficeName)";streetAddress="$($u.streetAddress)";l="$($u.l)";st="$($u.st)";co="$($u.co)";countryCode="$($u.countryCode)";c="$($u.c)";postalCode="$($u.postalCode)";department="$($u.department)";manager="$Mgr"} -PassThru | Rename-ADObject -NewName "$($u.name)"
}

Answer 1

So we will use get-aduser and filter on EmployeeID for the manager, and use Select -ExpandProperty for the DistinguishedName property. I also use the -PassThru switch on your Set-ADUser, and pipe it to Rename-ADObject. See how that suits you:
Import-Module ActiveDirectory
$Users=Import-Csv C:\info_update.csv
$Managers = Import-Csv C:\Managers.csv
foreach($u in $Users)
{
$Mgr = Get-ADUser -Filter "employeeID -eq '$($u.manager)'" | Select -ExpandProperty DistinguishedName
Get-ADUser -Filter "employeeID -eq '$($u.employeeID)'" -properties * | set-aduser -replace #{title="$($u.title)";extensionAttribute1="$($u.title)";givenName="$($u.givenName)";initials="$($u.initials)";middleName="$($u.middleName)";sn="$($u.sn)";physicalDeliveryOfficeName="$($u.physicalDeliveryOfficeName)";streetAddress="$($u.streetAddress)";l="$($u.l)";st="$($u.st)";co="$($u.co)";countryCode="$($u.countryCode)";c="$($u.c)";postalCode="$($u.postalCode)";department="$($u.department)";manager="$Mgr"} -PassThru | Rename-ADObject -NewName "$($u.name)"
}

Answer 2

Set-ADUser cannot be used to set Name. See http://technet.microsoft.com/en-us/library/ee617215.aspx
Try using Rename-ADObject:
Rename-ADObject [-Identity] <ADObject> [-NewName] <string>
Source: http://technet.microsoft.com/en-us/library/ee617225.aspx