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Used Ports

In this article

The following table lists required ports that must be opened for inbound/outbound requests in Veeam Backup for Microsoft Office 365.

Used Ports Note:

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

From	To	Protocol	Port	Description
Veeam Backup for Microsoft Office 365 Server	Microsoft Exchange Online	TCP	80, 443	Required to connect to Microsoft Exchange Online organizations.
	Microsoft SharePoint Online	TCP	80, 443	Required to connect to Microsoft SharePoint Online organizations.
	On-premises Microsoft SharePoint Server	HTTP (HTTPS)	5985 (5986 — used by default)	Required to connect to on-premises Microsoft SharePoint organizations via the WinRM port.
	On-premises Microsoft Exchange Server	TCP	80, 443	Required to connect to on-premises Microsoft Exchange organizations.
	Backup Proxy Server	TCP	9193 (used by default)	Required to manage inbound/outbound traffic when interacting with the Veeam Backup for Microsoft Office 365 server. Make sure to open this port on a backup proxy server.
	Backup Proxy Server	TCP	445	This port is used to: Install and manage the Veeam.Archiver.Proxy service on a target proxy machine. Perform RPC requests.
	Veeam Auto-update Server	HTTPS	443	Required to access the auto-update server and licensing server. For more information, see Checking for Updates and Installing License. The end point is: https://vbo.butler.veeam.com/json-rpc.php
	S3 Compatible object storage	HTTPS	443 (used by default)	Required to work with any of the object storage repositories.
	Amazon S3 object storage / IBM Cloud Object Storage
	Azure blob storage
Components	Veeam Backup for Microsoft Office 365 Server	TCP	9191	Required 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) Make sure to open this port on a Veeam Backup for Microsoft Office 365 server.
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	Required to manage inbound/outbound traffic when interacting with: Veeam Explorer for Microsoft Exchange Veeam Explorer for Microsoft SharePoint Make sure to open this port on a Veeam Backup for Microsoft Office 365 server.
Backup Proxy Server	Veeam Backup for Microsoft Office 365 Server	TCP	9191	Required to manage inbound/outbound traffic when interacting with backup proxy servers. Make sure to open this port on a Veeam Backup for Microsoft Office 365 server. You can also change this port, as described in Editing Backup Proxy Server.
	Microsoft Exchange Online	TCP	80, 443	Required to connect to Microsoft Exchange Online via EWS (Exchange Web Services).
	On-premises Microsoft SharePoint	HTTP (HTTPS)	5985 (5986)	Required 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	Required to maintain inbound/outbound traffic.