HOWTO: Resolve “Cannot connect to the virtual machine because the authentication certificate is expired or invalid”http://blogs.msdn.com/echarran/archive/2009/02/28/hoto-resolve-cannot-connect-to-the-virtual-machine-because-the-authentication-certificate-is-expired-or-invalid.aspxGreat forum post on how to resolve the error “cannot connect to the virtual machine because the authentication certificate is expired or invalid”.&#160; It all has to do with a certificate on the Hyper-V server that is only good for one year.&#160; Alen-USCommunityServer 2.1 SP1 (Build: 61025.2)Click &amp; Solve &raquo; HOTO: Resolve ???Cannot connect to the virtual machine because the authentication certificate is expired or invalid??? http://blogs.msdn.com/echarran/archive/2009/02/28/hoto-resolve-cannot-connect-to-the-virtual-machine-because-the-authentication-certificate-is-expired-or-invalid.aspx#9451345Sun, 01 Mar 2009 00:49:26 GMT91d46819-8472-40ad-a661-2c78acb4018c:9451345Click &amp; Solve &raquo; HOTO: Resolve ???Cannot connect to the virtual machine because the authentication certificate is expired or invalid??? <p>PingBack from <a rel="nofollow" target="_new" href="http://www.clickandsolve.com/?p=16172">http://www.clickandsolve.com/?p=16172</a></p> Hyper-V Error "cannot connect to the virtual machine because the authentication certificate is expired"http://blogs.msdn.com/echarran/archive/2009/02/28/hoto-resolve-cannot-connect-to-the-virtual-machine-because-the-authentication-certificate-is-expired-or-invalid.aspx#9586136Mon, 04 May 2009 20:30:09 GMT91d46819-8472-40ad-a661-2c78acb4018c:9586136"Obscurum per Obscurius" <p>This error appeared on one of my Hyper-V servers this morning. A search of TechNet revealed that KB967902</p>