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.
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:
For German Cloud:
For Chinese Cloud:
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:
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.