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Used Ports

In this article

The following table lists network ports that must be opened to manage inbound/outbound requests from/to various system components of Veeam Backup for Microsoft Office 365.

Used Ports Note:

Data communication between Microsoft Office 365 organizations and Veeam Backup for Microsoft Office 365 is done via an SSL connection.

From	To	Protocol	Port	Notes
Veeam Backup for Microsoft Office 365 Server	Microsoft Exchange Online	TCP	80, 443	To connect to Microsoft Exchange Online organizations.
	Microsoft SharePoint Online	TCP	80, 443	To connect to Microsoft SharePoint Online organizations.
	On-premises Microsoft SharePoint Server	HTTP (HTTPS)	5985 (5986 — used by default)	To connect to on-premises Microsoft SharePoint organizations via the WinRM port.
	On-premises Microsoft Exchange Server	TCP	80, 443	To connect to on-premises Microsoft Exchange organizations.
	Backup Proxy Server	TCP	9193 (used by default)	Must be opened on a backup proxy server to manage inbound/outbound traffic when interacting with the Veeam Backup for Microsoft Office 365 server.
	Backup Proxy Server	TCP	445	Must be opened on a target proxy server to: Install and manage the Veeam.Archiver.Proxy service on a target proxy machine. Perform RPC requests.
	Veeam Auto-update Server	HTTPS	443	To access the auto-update server and the licensing server. For more information, see Checking for Updates and Installing License.
Components	Veeam Backup for Microsoft Office 365 Server	TCP	9191	Must be opened on a Veeam Backup for Microsoft Office 365 server to manage inbound/outbound traffic when interacting with the following components: RESTful API PowerShell Veeam.Archiver.Shell (UI) (optionally) A remote management server (if any)
Veeam Explorer for Microsoft Exchange Veeam Explorer for Microsoft SharePoint (including Veeam Explorer for Microsoft OneDrive for Business)	Veeam Backup for Microsoft Office 365 Server	TCP	9194	Must be opened on a Veeam Backup for Microsoft Office 365 server to manage inbound/outbound traffic when interacting with: Veeam Explorer for Microsoft Exchange Veeam Explorer for Microsoft SharePoint
Backup Proxy Server	Veeam Backup for Microsoft Office 365 Server	TCP	9191	Must be opened on a Veeam Backup for Microsoft Office 365 server to manage inbound/outbound traffic when interacting with backup proxy servers. This port can be changed, as described in Editing Backup Proxy Server.
	Microsoft Exchange Online	TCP	80, 443	To connect to Microsoft Exchange Online via EWS (Exchange Web Services).
	On-premises Microsoft SharePoint	HTTP (HTTPS)	5985 (5986)	To connect to on-premises Microsoft SharePoint organizations via the WinRM port.
Cloud Gateway	A server that hosts Veeam Backup & Replication and Veeam Backup for Microsoft Office 365	TCP	9194	Maintains inbound/outbound traffic.