$Users = Import-Csv -Path "c:\temp\users.csv"

foreach($user in $Users){

    #Gets all unassigned number ranges. This needs to be done for each user in the foreach loop, as you keep changing the ranges.
    $UnasignedNumbers = Get-CsUnassignedNumber

    #Need to loop through all ranges to find which one the users number belong to.
    foreach($Range in $UnasignedNumbers){

        #From Get-CsUnassignedNumber you only get the first and last number of a range, not a number range readable in PowerShell.
        #We need to take away "tel:+47" from both start and end of the range.
        $StartRange = [int64]($Range.NumberRangeStart).Replace("tel:+47","")
        $EndRange = [int64]($Range.NumberRangeEnd).Replace("tel:+47","")

        #Now we create a number range readable in PowerShell. $NumberRange contains all the numbers in the range, nto jsut start and end.
        $NumberRange = $StartRange..$EndRange

        #We need to take away "tel:+47" from the users number.
        $StrippedNumber = ($User.LineURI).Replace("tel:+47","")

        #If the users number is inside the currently processed number range we will go on at split the range its in.
        If($NumberRange -contains $StrippedNumber){

        #The start of the range above the users number.
        $OneUp = "tel:+47"+([int64]$StrippedNumber+1)

        #The end of the range below the users number.
        $OneDown = "tel:+47"+([int64]$StrippedNumber-1)

        #Defiens the names of the two ranges. Use millisecon and a pause so you dont accedently give two ranges the same name.
        $LowRangeName = "Unasigned Numbers"+(Get-Date)+(Get-Date).Millisecond
        Start-Sleep -Seconds 1
        $HighRangeName = "Unasigned Numbers"+(Get-Date)+(Get-Date).Millisecond

        #Removes the number range the users number is a part of.
        Remove-CsUnassignedNumber -Identity $range.Identity

        #If the users number is the first one in the old range there is no need for creating a new range below the users number.
        #If its not the first number in the old range, you go on and create a new range below the users number.
        If($StrippedNumber -eq $StartRange){"Low range not needed!"}
        Else{New-CsUnassignedNumber -Identity "$LowRangeName" -AnnouncementName "Unassigned Number" -NumberRangeStart $Range.NumberRangeStart -NumberRangeEnd $OneDown}

        #If the users number is the last one in the old range there is no need for creating a range above the users number.
        #If its not the last number in the old range, you go on and create a new range above the users number.
        If($StrippedNumber -eq $EndRange){"High range not needed!"}
        Else{New-CsUnassignedNumber -Identity "$HighRangeName" -AnnouncementName "Unassigned Number" -NumberRangeStart $OneUp -NumberRangeEnd $Range.NumberRangeEnd}



        }

        Else{"Not in range!"}

    }

    #Removes the number and disables enterprise voice for the user.
    Set-CsUser -Identity $user.UPNOld -EnterpriseVoiceEnabled $false -LineURI ""

    #Adds the users phonenumber to the voice route that points incoming calls towards the SBC.
    $UserNumberForPattern = ($user.LineURI).Replace("tel:","")
    $OldNumberPattern = ((Get-CsVoiceRoute -Identity "Route to SBC").NumberPattern).trimend(')')
    $NewNumberPattaern = $OldNumberPattern+")|(\"+$UserNumberForPattern+"))"
    Set-CsVoiceRoute -Identity "Route to SBC" -NumberPattern $NewNumberPattaern

}




#This part needs to be run with Skype Online PowerShell.

foreach($user in $users){


    #Adds the users number to a teams user, activates enterprice voice and sets various policies.
    Set-CsUser -Identity $user.UPNNew -EnterpriseVoiceEnabled $true -HostedVoiceMail $false -OnPremLineURI $user.LineURI
    Grant-CsOnlineVoiceRoutingPolicy -Identity $user.UPNNew -PolicyName Norway
    Grant-CsTeamsUpgradePolicy -Identity $user.UPNNew -PolicyName UpgradeToTeams
    Grant-CsTeamsCallingPolicy -Identity $user.UPNNew -PolicyName AllowCalling

}