Unable to send report via Exchange Online

[fabio75]

Hello.

I use VEEAM and Exchange Online everywhere. I never had this problem.
Freshly configured Exchange Online and freshly installed VEEAM Backup and Replication.
When I try to configure email notification I get error stating that something went wrong, maybe Username and Password... this is not true.
There must be something in Exchange Online new default that is blocking VEEAM to send e-mail via SMTP protocol.

Someone know how to fix?

Thank you.
Fabio

[nielsengelen]

We are not aware of any changes on this front. Could you open a support case for insight and let us know the case ID?

[johan.h]

Would this maybe be related? Microsoft is disabling basic SMTP authentication in M365 tenants where it is not actively being used. https://docs.microsoft.com/en-us/exchan ... nge-online

[Regnor]

Johan.h is right, and especially new tensnts will have it blocked by default. If this the case, I would rather try to send the mails unauthenticated to your Exchange Online MX record.
That would be Option 2 or Option 3 if the following article:
https://docs.microsoft.com/en-us/exchan ... office-365