Import Contacts to Office365

import-contact.ps1

param (
    [Parameter(mandatory=$true)]
    [string]$principal,
    
    [Parameter(mandatory=$true)]
    [string]$name,
    
    [Parameter(mandatory=$true)]
    [string]$email,
    
    [Parameter(mandatory=$true)]
    [string]$firstname,
    
    [Parameter(mandatory=$true)]
    [string]$lastname
)

Import-Module ExchangeOnlineManagement

#Connect-ExchangeOnline -InlineCredential

Connect-ExchangeOnline -UserPrincipalName $principal

New-MailContact -Name $name -DisplayName $name -ExternalEmailAddress $email -FirstName $firstname -LastName $lastname

Disconnect-ExchangeOnline -Confirm:$false