To add a network adapter to a virtual machine in vCenter, follow the below steps:
1. Open vSphere Client and connect to your vCenter server.
1. Select the virtual machine that you want to add the network adapter to.
1. Right-click the virtual machine and select Edit Settings.
1. In the Virtual Hardware tab, click Add.
1. Select Network Adapter and click Next.
1. Choose the network adapter type and click Next.
1. Select the appropriate network and click Next.
1. Choose the adapter settings for the new adapter and click Next.
1. Review the summary and click Finish.
1. Click OK to save the changes.
The new network adapter will be added to the virtual machine, and you can configure it to your network requirements.
