How to convert AD phonenumbers into E.164 format

I needed a quick way of washing numbers in AD with special characters and space to E.164 format.

I made this powershell script that got the job done.

This script is for Norwegian phoneenumbers but can easily be changed to you countrycode by changing "+47" into whatever conuntrycode you need.

If you have a large number of users I got an out of range exception.
I then needed to run the script in small steps by selecting a user range.

I then changed the first line to this:

Get-ADUser -LDAPFilter "(&(sn>=a)(sn<=k))" -properties homephone,mobilephone,telephonenumber

Save the script to a file with .ps1 extension and run in AD-powershell module as admin.

$mobileUsers = Get-ADUser -LDAPFilter "(&(objectCategory=Person)(objectClass=User))" -properties *

$mobileUsers.SamAccountName

foreach ($user in $mobileUsers)

    {

                          $user.SamAccountName

             if ($user.MobilePhone)

                  {

                  $mobileNumber= $user.MobilePhone

                 }

                 if ($user.telephoneNumber)

                 {

             $telephoneNumber = $user.telephoneNumber

                 }

                 if ($user.homephone)

                 {

             $homephoneNumber = $user.homephone

                 }

             $mobileNumber = $mobileNumber -replace "[^0-9]"

             $telephoneNumber = $telephoneNumber -replace "[^0-9]"

             $homephoneNumber = $homephoneNumber -replace "[^0-9]"

            

             $mobileNumber = "+47" + $mobileNumber

             $telephoneNumber = "+47" + $telephoneNumber

             $homephoneNumber = "+47" + $homephoneNumber

             $mobileNumber

             $telephoneNumber

             $homephoneNumber

                

                  if ($user.MobilePhone)

                  {

             $user.MobilePhone = $mobileNumber

                 Set-ADUser -instance $user

                 }

             if ($user.telephoneNumber)

                 {

                 $user.telephoneNumber = $telephoneNumber

                 Set-ADUser -instance $user

                 }

                 if ($user.homephone)

                 {

             $user.homephone = $homephoneNumber

             Set-ADUser -instance $user

                 }

}