question

Are you just trying to set the accounts to the "Enabled" status?

If so, see if this helps:

 Get-Content x:file.txt |
     ForEach-Object{
         $uname = $_    # needed because you can't use $_ in a "Catch" block for this value
         if ($user = Get-ADUser -Filter {Name -eq $uname}){
             Try{
                 $user | Set-ADUser -Enabled -ErrorAction STOP
             }
             Catch{
                 Write-Host "Failed to enable user '$uname'"
             }
         }
         else{
             Write-Host "Failed to find user '$uname'"
         }

Hi,

The Set-ADUser cmdlet can modify the properties of AD users for you.

 $file = 'C:\test\name.txt'
 Get-Content -Path $file | Get-ADUser | Set-ADUser -Replace @{useraccountcontrol=512}

You can refer to the link below for details about the useraccountcontrol property.
https://docs.microsoft.com/en-us/troubleshoot/windows-server/identity/useraccountcontrol-manipulate-account-properties

Best Regards,
Ian Xue
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Here's an example of bad things that can happen when an array of bits, each of which have a special meaning, is mishandled:

 [uint32]$bitmap = 0x0002        # account disabled (2)
 $bitmap = $bitmap -bor 0x0400   # cannot change password (64)
 $bitmap = $bitmap -bor 0x010000 # password never expires (65536)
 ""
 [Convert]::ToString($bitmap,2)
 $bitmap = 0x0200                # Normal user (512)
 [Convert]::ToString($bitmap,2)

The original value is simply replaced instead of having just the one bit manipulated:

10000010000000010 <=== Before
1000000000 <=== After