Exchange Online legacy App ID (ExO PowerShell client) deprecation

[ninobb]

I just wanted to point out that what is known as "ExO PowerShell public client" - full name Legacy Exchange Online Public Client ID (app ID a0c73c16-a7e3-4564-9a95-2bdf47383716) will be retired on March 31, 2023.

Documentation (and what to use instead) here:
https://learn.microsoft.com/en-us/partner-center/announcements/2023-january#exchange-online-automation-affecting-change-on-march-31-2023

I think the samples here still reference this client as something to use.