Here’s how to fix it You have to issue a new self-signed certificate for *.cloud.onebox.dynamics.com and change the web site binding settings to use it. Step 1: Create a new self-signed certificate Run the following Power Shell command (Run as Administrator): New-SelfSignedCertificate -CertStoreLocation cert:\LocalMachine\My -DnsName *.cloud.onebox.dynamics.com -KeyUsage EncipherOnly, CRLSign, CertSign, KeyAgreement, DataEncipherment, KeyEncipherment, NonRepudiation, DigitalSignature, DecipherOnly -NotAfter (Get-Date).AddMonths(60) This would create a new certificate, which has been set to expire in 60 months: For creating self-signed certificates, you can also use this free Self-Signed Certificate Generator . Step 2: Copy the new certificate to the folder where trusted certificates are stored Open Manage computer certificates (certlm). Newly generated certificate can be found in Personal\Certificates folder. It has the same name as the old one, but different expirat...