Using Group Policy or Registry, you can turn off NCSI active probes. This may hide connectivity problems.
msftconnecttest.com is a safe, legitimate Microsoft domain. It is not malware. However, malware can sometimes hijack your DNS settings to redirect legitimate traffic to malicious sites. If you see this domain constantly popping up in your browser without reason, it is wise to scan your system with an antivirus tool to ensure your Hosts file or DNS settings haven't been tampered with. msftconnecttest.com/redirect