Backup Proxy Servers

A backup proxy server is an architecture component that conducts all read and write activities during data backup, backup copy and restore operations, routes backup traffic, performs data move, handles data compression and encryption and sends email notifications about backup and backup copy job results.

Consider the following:

• By default, the role of the backup proxy server is assigned to the machine where Veeam Backup for Microsoft 365 is installed. The default backup proxy server is displayed as Local backup proxy in Veeam Backup for Microsoft 365.

After you install Veeam Backup for Microsoft 365, you can configure an additional set of backup proxy servers and group them into backup proxy pools. This approach allows you to manage your data in a more efficient manner. For more information about backup proxy pools, see Backup Proxy Pools.

• A backup proxy server can be a physical or virtual machine.
• Veeam Backup for Microsoft 365 automatically installs Veeam Backup for Microsoft 365 Proxy Service on a computer that you want to use as a backup proxy server when you add a backup proxy server to the Veeam Backup for Microsoft 365 backup infrastructure. For more information, see Adding Backup Proxy Servers.
• Veeam Backup for Microsoft 365 allows you to assign a role of the backup proxy server to machines with Microsoft Windows or Linux operating systems installed.

• Veeam Backup for Microsoft 365 server and a backup proxy server must be reachable to each other by their DNS name.

• Veeam Backup for Microsoft 365 allows you to deploy the following types of Windows-based backup proxy servers:

• Domain backup proxy
• Workgroup backup proxy

For more information, see Deployment Scenarios for Windows-based Backup Proxy Servers.

• Veeam Backup for Microsoft 365 supports adding Linux-based backup proxy servers that can be non-domain and domain.
• Each backup proxy server can process one or several organizations.
• An organization can be processed by one or several backup proxy servers.
• A remote Linux-based backup proxy server can be associated only with object storage repositories.
• A remote Windows-based backup proxy server and the default backup proxy server can be associated with object storage repositories and JET-based backup repositories.
• A backup proxy server is responsible for sending email notifications about backup and backup copy job results.

For more information on how to configure email notification settings, see Notification Settings.

• For each backup proxy server, Veeam Backup for Microsoft 365 saves information about restore points to the configuration database created on the PostgreSQL instance. Veeam Backup for Microsoft 365 collects this information from all backup repositories associated with this backup proxy server.
• On Linux-based backup proxy servers, unattended upgrades of .NET can impact a backup proxy server availability. To prevent unattended upgrades:

• On Ubuntu hosts, .NET (dotnet-) must be added to the blacklist.
• On Red Hat hosts, .NET (dotnet-*) must be added to the excludepkgs list.

For more information, see this Veeam KB article.

Deployment Scenarios for Windows-based Backup Proxy Servers

Veeam Backup for Microsoft 365 offers the following deployment scenarios for a Windows-based backup proxy server:

• Domain backup proxy

In this scenario, a machine used as a backup proxy server resides in the same domain as the Veeam Backup for Microsoft 365 server or in a trusted domain. To establish a connection with a domain backup proxy, Veeam Backup for Microsoft 365 uses credentials that you provide when you add a backup proxy server to the Veeam Backup for Microsoft 365 infrastructure.

• Workgroup backup proxy

In this scenario, a machine used as a backup proxy server resides in a workgroup. To establish a connection with a workgroup backup proxy, Veeam Backup for Microsoft 365 uses an SSL certificate. For more information, see Security Settings.

You can deploy the Veeam Backup for Microsoft 365 server and backup proxy servers in different workgroup–domain combinations.

The following table lists possible variants of interactions between the Veeam Backup for Microsoft 365 server and backup proxy servers in the backup infrastructure:

In This Section

• Adding Backup Proxy Servers
• Editing Backup Proxy Server Settings
• Rescanning Backup Proxy Servers
• Upgrading Backup Proxy Servers
• Removing Backup Proxy Servers
• Modifying Backup Proxy Server Properties