Powershell command to bulk change user Fullname in OU

Hi all, I'm looking for a power shell command to change all the user's Fullname (john.doe) to John Doe. I'm a beginner with powershell and have not done one to change AD objects. Any help would be greatly appreciated.
axp2948Asked:
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Raheman M. AbdulSenior Infrastructure Support Analyst & Systems DeveloperCommented:
Try this:  (not tested)
Import-Module ActiveDirectory

$users = Get-ADUser -SearchBase 'ou=LondonUsers,dc=company,dc=com' -Filter *

ForEach-Object($user -in $users)
   {
       rename-adobject -identity $($user.distinguishedname) -newname $($($user.distinguishedname).replace("."," "))
   }

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David Johnson, CD, MVPOwnerCommented:
added routine to uppercase the first and last name
$users = Get-ADUser -SearchBase 'ou=LondonUsers,dc=company,dc=com' -Filter *

ForEach-Object($user -in $users)
    {
    $splituser = $user.distinguishedname.split('.')
    $displayName = $splituser[0] + " " + $splituser[1]
    $newdisplayname = (Get-Culture).TextInfo.ToTitleCase($displayName)
    rename-adobject -identity $user.distinguishedname -newname $newdisplayname -whatif
    }

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axp2948Author Commented:
Thank you all!
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