If the IP address of the vCenter server of interest to you is not available in the list, then, you can add the details of the vCenter server on-the-fly, by selecting the Other option from the Virtual Center list. This will invoke the Add vCenter Details page. Specify the following details in this page to add a new vCenter server:

• Provide the IP or hostname of the vCenter server being added in the vCenter Identity (IP or Host name) text box.
• Then, indicate whether the eG manager is to connect to vCenter using SSL or not by selecting the Yes or No option from the Use SSL to connect to vCenter list.
• By default, in most virtualized environments, vCenter listens on port 80 (if not SSL-enabled) or on port 443 (if SSL-enabled) only. This implies that while discovering ESX servers using vCenter, eG Enterprise communicates with vCenter via the default ports 80 or 443, depending upon the SSL-enabled status of vCenter. Accordingly, the Web Port parameter is set to 443 by default, if the SSL flag is set to Yes, and displays the default value 80 if the SSL flag is set to No.In some environments however, the default ports 80 or 443 might not apply. In such a case, in the Web Port text box, specify the exact port at which vCenter in your environment listens.
• If the vCenter being added is to be used for ESX discovery as well, set the Discover ESX hosts using this vCenter flag to Yes. Otherwise, set this flag to No.
• In order to be able to discover ESX servers using a vCenter server, the eG manager needs to connect to vCenter using the credentials of a valid user to vCenter. Provide the user name and password of such a user in the Username to connect to vCenter and Password for the user text boxes. This user typically requires Administrator or Virtual Machine Administrator privileges. However, if you cannot expose the credentials of such a user owing to security constraints, then, you can use the credentials of a user with ‘Read-only’ privileges to vCenter. If such a user pre-exists, then, provide the name and password of that user in the text boxes mentioned above. Otherwise, assign the ‘Read-only’ role to a local/domain user to vCenter, and provide the name and password of this user in the Username to connect to vCenter and Password for the user text boxes. The steps for achieving this are detailed in Monitoring VMware Infrastructures document.
• Confirm the password of the user by retyping it in the Comfirm password for the user text box.
• You can then click the Update button to save the vCenter configuration. To erase all the information already feeded, click on the Clear button.