If you are going to use Microsoft 365 email account for Veeam Notifications, it happened that SmtpClientAuthentication is disabled for the Tenant error. Today I will show you how to fix it.
The Azure archiver appliance is a small auxiliary machine in Microsoft Azure that is deployed and configured automatically by Veeam Backup for Microsoft 365. Veeam services that Veeam Backup for Microsoft 365 installs on the Azure archiver appliance compress data passed through. This helps reduce network traffic and increase the speed of backup copy.
Veeam Backup for Microsoft 365 supports different Azure storage account types for standard and premium performance tiers. Tables in this section list the supported storage account types.
Veeam Backup for Microsoft 365 use backup proxy servers to leverage network when backup or restore data. The Veeam Backup for Microsoft 365 manager server is the default local backup proxy server.
When you add an organization using the modern app-only authentication method, you are required to provide Azure AD application settings. Please reference following link to create and configure Azure AD Application permissions.
Veeam Backup for Microsoft 365 Modern Authentication and Legacy Protocols Authentication requires that you grant permissions to Azure AD applications to back up and restore data from/to your Microsoft 365 organizations.