We are attempting to implement this and are noticing some inconsistencies with the email notifications that are sent when a file request is created.
In some cases we are seeing the emails go out from no-reply at sharepoint dot com and in other cases the emails go out from username at domain dot onmicrosoft dot com
The onmicrosoft emails are often rejected or quarantined on client systems as spam.
The primary SMTP address is set correctly to the username at domain dot com address in AAD.
I can't find any settings in Sharepoint or Exchange that would explain why some are going out using the sharepointonline.com account vs the onmicrosoft.com address.
Updated Jun 08, 2023
Version 3.0