Restoring client-server communications with
Communication Update Package Deployment

If the client-server communications break, you can quickly restore communications by replacing the Sylink.xml file on the client computer. You can replace the Sylink.xml file by deploying a communication update package. Use this method for a large number of computers, for the computers that you cannot physically access easily, or the computers that require administrative access.
Communication Update Package Deployment
is available as of version 12.1.2. For earlier versions, you can use alternate methods to replace the Sylink.xml file.
  1. To restore client-server communication settings with
    Communication Update Package Deployment
  2. In the console, launch the
    Client Deployment Wizard
    .
    Click
    Help > Getting Started Page
    and then under
    Required tasks
    , click
    Install the client software on your computers
    .
    For 12.1.x, in the
    Common Tasks
    menu, click
    Install a client
    .
  3. In the
    Client Deployment Wizard
    , under
    Communication Update Package Deployment
    , select whether you want a package for Windows or Mac clients, and then click
    Next
    .
  4. Select the group on which you want to apply the policy, and then click
    Next
    .
    For Windows clients only, you can set password protection.
  5. Choose one of the following deployment methods, and then click
    Next
    :
  6. After the communication update package is applied, confirm that the computers successfully communicate with
    Symantec Endpoint Protection Manager
    .