Overview of inbound and outbound ports that RTS is using:
Note: The ports listed below are valid no matter where Realtime Service (RTS) is installed (on-premise or in the cloud). If installed behind a firewall, then appropriate inbound ports and outbound ports should be used for RTS to communicate with other components.
Office 365
Source | Destination | Protocol | Action | Direction | Description |
Office 365 / Entra ID | Realtime Service | TCP/80/443 | Allow | Outbound | Exchange Online and Entra ID communication. |
Office 365 / Entra ID | Realtime Service | TCP/10002 | Allow | Inbound | Exchange Online push notification receiver port |
Realtime Service | SQL | TCP/1433 | Allow | Outbound | Database communication |
On Premise network
Source | Destination | Protocol | Action | Direction | Description |
Exchange | Realtime Service | TCP/80/443 | Allow | Outbound | Exchange communication. |
Exchange | Realtime Service | TCP/10002 | Allow | Inbound | Exchange Online push notification receiver port |
Realtime Service | SQL | TCP/1433 | Allow | Outbound | Database communication |
Realtime Service | LDAP (Domain Controller) | TCP/445,139,135,53,88,389 | Allow | Outbound / Inbound | Active Directory communication |
Realtime Service | LDAP (Domain Controller) | UDP/389 | Allow | Outbound / Inbound | Active Directory communication |
RTS = RealTime Service (Windows services)
RTM = RealTime Manager
Note: RealTime Services uses the following DNS names for communicating with Office 365, Exchange Online, Azure AD:
For Azure Cloud:
- login.windows.net
- graph.windows.net
- autodiscover-s.outlook.com
For German Cloud:
- login.microsoftonline.de
- graph.cloudapi.de
- autodiscover-s.outlook.de
For Chinese Cloud:
- login.chinacloudapi.cn
- graph.chinacloudapi.cn
- autodiscover-s.partner.outlook.cn
Overview of needed IP addresses:
You can have an overview of IP addresses RTS is using when talking to Office 365 by visiting this page:
https://learn.microsoft.com/en-us/microsoft-365/enterprise/urls-and-ip-address-ranges
The above dns names are listed in the following sections:
- Microsoft 365 Common and Office Online
- Exchange Online
But as the IP addresses change frequently, we do not recommend locking down the traffic to specific addresses. Rather consider using Conditional access if this is a possibility. Or using the Json or pac file to ensure that your public firewall has the correct addresses.
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