Client Install Fails: Log: ClientIdManagerStartup - Server rejected registration request: 3

Question

Trying to install the client onto Windows Server 2008 R2 Servers using ConfigMgr 2012R2. no PKI is being used. We do not see this issue on any workstations, only servers.
It returns the following:
Got registration response from MP. Client approval status: -1
[RegTask] - Server rejected registration request: 3 ClientIDManagerStartup 
Actions taken based on other Articles:
1.Delete the c:\windows\smscfg.ini file
2)    Run CCMDELCERT on the client
3)    Restart the SMS agent Host service.
Result: FAILED, it comes back with the same errors.
MP_RegistrationManager.log shows:
MP Reg: Client in-band certificate is not valid due to failures in certificate chain validation, Raising status event. Failure HR = 0x800b010a, In-band Cert SubjectName = Servername - SERVER
Raising event:
[SMS_CodePage(437), SMS_LocaleID(1033)]
instance of MpEvent_CertInvalidChain
 ClientID = "GUID:D32A0A76-E832-49B6-A431-084DB435FD83";
 DateTime = "20140520175614.768000+000";
 MachineName = "Servername.tes.name.com";
 ProcessID = 3444;
 SiteCode = "XYZ";
 SubjectName = "Servername - SERVER";
 ThreadID = 17368;
 Win32ErrorCode = 2148204810;
MP Reg: Registration request body is invalid.
Any other ideas out there???
David Baur

Answer 1

Do the following to check the SMS self-signed certificates
Start MMC.exe
Add/Remove Snapin -> Select Certificates -> Select local computer
Locate the SMS folder
Find the SMS Signing certificate and SMS Encryption Cerrtificate - check if they have expired. If they have expired - delete them.
Retry client installation