By default, all the transport agents listed in Table 1 are installed on the Hub Transport server role. An agent must be installed and enabled for you to use the associated transport feature. Only the agents that provide the messaging features that are designed to be deployed inside the organization are installed by default. Agents that are not installed are designed for use in the boundary network on a computer that has the Edge Transport server role installed. To view the agent configuration, run the Get-TransportAgent command in the Exchange Management Shell.

You can install the anti-spam agents on the Hub Transport server role by using the provided Install-AntiSpamAgents.ps1 script. The script is located in the %programfiles%\Microsoft\Exchange Server\Scripts folder. After you run this script, all of the anti-spam agents are installed and enabled, and the Anti-spam tab is available in the Exchange Management Console.

Table 1 shows the default configuration for agents on the Hub Transport server role.

Table 1   Default configuration for agents on the Hub Transport server role

For more information, see the following topics:

• Managing Anti-Spam and Antivirus Features
  
  
• Transport Agent Cmdlets
  
  
• Managing Messaging Policy and Compliance Features