ecsm-dataswap-365.ps1

# 
<#
.SYNOPSIS
    Copy an O365 attribute to another field
.DESCRIPTION
    This script copies the data from a user defined to another user defined field
.NOTES
    Email: helpdesk@exclaimer.com
    Date: 31st August 2016
.USAGE
    As the attributes cannot be specified using variables you will need to do the following to tailor the script to your use
    - Replace all instances of <field1> with the field you have data you want copying
    - Replace all instances of <field2> with the field you wish to copy to
    - You can further filter the Get-User command that obtains the user information with the -filter parameter.  Examples of this below
        - Get-User -Filter "HomePhone -like '*'"
.PRODUCTS
    Exclaimer Cloud - Sigonatures for Office 365
.REQUIREMENTS
    - Global Administrator Account
#>

function basic-auth-connect {
    $LiveCred = Get-Credential  
    $Session = New-PSSession -ConfigurationName Microsoft.Exchange -ConnectionUri https://ps.outlook.com/powershell/ -Credential $LiveCred -Authentication Basic -AllowRedirection
    Import-PSSession $Session   
}

function modern-auth-mfa-connect {
    Import-Module ExchangeOnlineManagement
    $upn = Read-Host ("Enter the UPN for your Global Administrator")
    Connect-ExchangeOnline -UserPrincipalName $upn
}

function modern-auth-no-mfa-connect {
    Import-Module ExchangeOnlineManagement
    $LiveCred = Get-Credential
    Connect-ExchangeOnline -Credential $LiveCred
}
    
$authtype = Read-Host ("Do you have basic auth enabled? Y/n")

If ($authtype -eq "y") {
    basic-auth-connect
}
Else {
    $mfa = Read-Host ("Do you have MFA enabled? Y/n")
    if ($mfa -eq "y") {
        modern-auth-mfa-connect
    }
    Else {
        modern-auth-no-mfa-connect
    }
}

$users = Get-User | Select UserPrincipalName,"<field1>","<field2>" | Export-CSV -Path $env:APPDATA\Users.csv -NoTypeInformation
$out = Get-User | Select UserPrincipalName,"<field1>","<field2>"
 
Write-Host ("These are the users that are going to be altered. There is a CSV of this outputted to %appdata%\Users.csv")
Write-Output $Out
Write-host ("")
$confirm = Read-Host ("Are you sure you want to make these changes? y/N")
 
if ($confirm -eq "y" -or "yes") {
    Import-CSV $env:appdata\users.csv | foreach { Set-User $_.UserPrincipalName -"<field2>" $_."<field1>" } }