Disable No Internet Access notification on Windows Server 2012 R2
Login to the server with the administrator account. Right click on the start button and click Run. In the box type gpedit.msc, this would bring up the Local Group Policy Editor. Navigate to Computer Configuration > Policies > Administrative Templates > Network > Network Connections. On the right pane, double click the policy setting Do not show the “local access only” network icon.
Click on Enabled to enable this policy setting. Click Apply and OK. Close the Local Group Policy Editor. You need to update the group policy on the server. Launch the command prompt and type the command gpupdateand hit enter.
Log off and login back to the server and you will see the yellow icon at network connection icon is not seen.