Can't add IP address: This network interface obtains IP addresses automatically

Symptoms

Can't add an IP address in Plesk > Tools & Settings > IP Addresses

Cannot add the IP address 203.0.113.2. This network interface obtains IP addresses automatically.

Cause

Static IP addresses cannot be added to DHCP network interfaces.

Resolution

Change the network interface to static.

Note: It is highly recommended to perform this task during maintenance time.

1. Connect to the server via RDP

2. Get the current DHCP IP addresses from IPv4/IPv6 Addresses, Subnet Mask, Default Gateway, DNS Servers with this command

   ipconfig /all

3. Go to Control Panel > Network and Internet > Network and Sharing Center > Change adapter settings > example_interface > Properties > Internet Protocol Version 4|6 (TCP/IPv4|IPv6).

4. Select Use the following IP address

5. Add the IP addresses from Step 2

6. Press OK