MicrosoftI'm wondering if this statement is false from the blog post:
- Note that all federated usersmust be created on-premisesand must be synced using the Microsoft Azure Active Directory Sync Tool, thus are not applicable for HVE.
The same note is not included over here - https://learn.microsoft.com/en-us/Exchange/mail-flow-best-practices/high-volume-mails-m365:
Note
A few additional notes around authentication:
- If Security Defaults is enabled, all basic authentication including SMTP is disabled, making High Volume Email (HVE) non-functional.
- HVE accounts can operate even if SMTPClientAuthenticationDisabled is set to True within TransportConfig, due to the use of the custom endpoint.
- To avoid any impact from authentication policies, it's important for customers to ensure AllowBasicAuthSmtp is enabled in their organization for the HVE account. Custom authentication policies can be applied to the HVE accounts as needed.
