Try this variant:

# Get template user logon hours
$userLogonHoursEnabled = Get-QADUser nologonhours -IncludedProperties logonhours
$logonHours = $userLogonHoursEnabled["logonHours"]
# Set logon hours on user
Get-QADUser blopez | Set-QADUser -ObjectAttributes @{logonHours = $logonHours}

LogonHours attribute has OctetString syntax. Therefore it's stored in AD as array of bytes. Get-QAD* cmdlets convert attribute values to user-friendly form by default. To get raw attribute value you have to use either method above either -DontConvertValuesToUserFriendlyReperesentation switch.

Try with the array comma operator:

$template = Get-QADUser nologonhours -IncludedProperties logonhours
$logonHours=$template.DirectoryEntry.logonHours
Set-QADUser blopez  -oa @{logonHours = ,$logonHours}

Can I get a little help on this please?  I'm trying to use this script to disable a list of users logonHours.  I want to get the list from a text file.  If I run the commands below one by one on my PS cmd line, it works fine but when I try to iterate over the names from the text file I get this error:
Cannot index into a null array.
At D:\scripts\DisableUserLogonHours.ps1:22 char:22
+ $dirEntry.Properties[ <<<< "logonHours"].Value = $logonHours
    + CategoryInfo          : InvalidOperation: (logonHours:String) [], RuntimeException
    + FullyQualifiedErrorId : NullArray
 
You cannot call a method on a null-valued expression.
At D:\scripts\DisableUserLogonHours.ps1:23 char:24
+ $dirEntry.CommitChanges <<<< ()
    + CategoryInfo          : InvalidOperation: (CommitChanges:String) [], RuntimeException
    + FullyQualifiedErrorId : InvokeMethodOnNull


Here is the script:
$userLogonHoursDisabled = Get-QADUser test-Betty10 -IncludedProperties logonhours
$logonHours = $userLogonHoursDisabled["logonHours"]

#Specify the path to the input file that contains the list of users
$UserList  = Get-Content D:\scripts\DisableLogonHours.txt

#Iterate through the list of Users in the file and disable all logon hours
foreach ($user in $UserList) {
$disableUserHours = Get-QADUser $user
$dirEntry = $user.DirectoryEntry.PSBase
$dirEntry.Properties["logonHours"].Value = $logonHours
$dirEntry.CommitChanges()
}


The script keeps failing on this line:
$dirEntry.Properties["logonHours"].Value = $logonHours

If I don't read the name in from a text file and manually put it in, no problem.  I'm a novice at this and don't understand the error message.  Can somebody help?  Shay? By the way, I could not get Shay's script to work in my shell which is why I am using this one.

Thank you,
-Theo

Tried it and it didn't work.  Here is my error:
Set-QADUser : The server is unwilling to process the request.
At line:1 char:39
+ get-qaduser test-betty10 | set-qaduser <<<<  -objectattributes @{logonHours='FFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFF
FF'} #all hours allowed
    + CategoryInfo          : NotSpecified: (:) [Set-QADUser], DirectoryServicesCOMException
    + FullyQualifiedErrorId : System.DirectoryServices.DirectoryServicesCOMException,Quest.ActiveRoles.ArsPowerShellSn
   apIn.Powershell.Cmdlets.SetUserCmdlet

Why does my script fail reading the username from a text file and work correctly when I enter each line in the script one by one in my shell?  I've got a list of about 50 users that I need to do this for.

What does the error mean?
Set-QADUser : The server is unwilling to process the request.
At line:1 char:39
+ get-qaduser test-betty10 | set-qaduser <<<<  -objectattributes @...

What did my script error mean?
+ $dirEntry.Properties[ <<<< "logonHours"].Value = $logonHours
    + CategoryInfo          : InvalidOperation: (logonHours:String) [], RuntimeException
    + FullyQualifiedErrorId : NullArray
 
You cannot call a method on a null-valued expression.
At D:\scripts\DisableUserLogonHours.ps1:23 char:24
+ $dirEntry.CommitChanges <<<< ()
    + CategoryInfo          : InvalidOperation: (CommitChanges:String) [], RuntimeException
    + FullyQualifiedErrorId : InvokeMethodOnNull

What is the help command to show me what me this means?
-objectattributes @{
Or this?
Get-QADUser -ip | ft

Thank you