/mcp• Enter Remote Server Name or IP, Export Data Directory, Remote Login ID, Remote Password, and Confirm Password. Click OK to restart the network using the new configuration. Step 9 The Certificate Information window is displayed. Step 10 In Certificate Information window, enter your certificate signing request information and click OK. Step 11 In the First Node Configuration window, choose how you want to assign this node: • Yes—Choose this option to assign this node as the Cisco Unified Communications Manager publisher node. • No—Choose this option to assign this node as a Cisco Unified Communications Manager subscriber node, or as an IM and Presence Service node. What to do next If you are installing the first node in the cluster, go to one of the following procedures, depending on whether you are installing Unified Communications Manager or the IM and Presence Service: • Configure the Unified Communications Manager Publisher, on page 55 • Configure the IM and Presence Publisher, on page 58 Otherwise, for subscriber node installs Add Subscriber Nodes, on page 58. Configure the Unified Communications Manager Publisher Follow this procedure to configure the first server where you install Unified Communications Manager software as the publisher node for the cluster. Perform this procedure after you have completed the attended installation and configured the attended installation. You can configure Smart Call Home on the publisher node only. Note Procedure Step 1 The Network Time Protocol Client Configuration window appears. We recommend that you use an external NTP server to ensure accurate system time on the publisher node. Subscriber nodes in the cluster will get their time from the first node. Step 2 Choose whether you want to configure an external NTP server or manually configure the system time. • To set up an external NTP server, choose Yes and enter the IP address, NTP server name, or NTP server pool name for at least one NTP server. You can configure up to five NTP servers, and we recommend that you use at least three. Choose Proceed to continue with the installation. The system contacts an NTP server and automatically sets the time on the hardware clock. Note If the Test button appears, you can choose Test to check whether the NTP servers are accessible. Installation Guide for Cisco Unified Communications Manager and the IM and Presence Service, Release 15 and SUs 55 Installation Methods Configure the Unified Communications Manager Publisher