How to Fix PowerShell Script from Basic Auth to Modern Auth

Question

Greetings,

I am not a manager of an Exchange Server, I'm just a guy whose PowerShell script used to work until 9/1/2022. Now it doesn't work per the Exchange Basic Auth to Modern Auth update.

I have a PowerShell script that, after pinging a server address, uses Basic Auth to send an automated email via Task Scheduler. Microsoft has deprecated Basic Auth in Exchange Online in favor of Modern Auth, but I do not see clear directions for updating a PowerShell script to use Modern Auth.

This is an example of the Basic Auth script that I need to convert to Modern Auth:

$secpasswd = ConvertTo-SecureString “password” -AsPlainText -Force  
$mycreds = New-Object System.Management.Automation.PSCredential (“alias AT place dot com”, $secpasswd)  
Send-MailMessage -SmtpServer smtp.office365.com -Port 587 -From alias AT place dot com -To anotheralias AT place dot com -Subject test -Body test -Credential $mycreds -UseSsl"  

I cannot find ANY information on how to update this script to use the Modern Auth method.

Can someone please point me to an example of a PS script with email Modern Auth being used in a similar script or share the specific code for what I need to do to update and run the above script?

Many Thanks!

Answer 1

Hi @KeithVanEaton-0729

Here is a nice easy video for setting up authentication via certificate (so you can automate your PowerShell script unattended):

How to setup ExchangeOnlineManagement for unattended scripting using a certificate (by TechSnips)

https://www.youtube.com/watch?v=GyF8HV_35GA

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If this is helpful please accept answer.

Answer 2

Thanks @Dillon Silzer for your suggestions, the fix eventually came down to this:

from ******@place.com I had to drop the 'place.com' and just keep the alias  
with -SmtpServer smtp.office365.com I had to drop 'office365.com' and replace with '[uni].edu'