#
# Enables SMTP Auth for Office365 emails, so you can send emails via a script for application.
# Shall be run via Powershell terminal.
#

# Define your email address that will send emails via SMTP auth
$emailAddress = 'test@test.com'

# asks for email/password
$UserCredential = Get-Credential

# creates basic auth session
$Session = New-PSSession -ConfigurationName Microsoft.Exchange \
   -ConnectionUri https://outlook.office365.com/powershell-liveid/ 
   -Credential $UserCredential -Authentication Basic -AllowRedirection

# initiates the session
Import-PSSession $Session -DisableNameChecking

# enables SMTP auth
Set-CASMailbox -Identity $emailAddress -SmtpClientAuthenticationDisabled  $false

# verifies the action, shall be set as False
Get-CASMailbox -Identity $emailAddress | Format-List SmtpClientAuthenticationDisabled