Failed to send registration request message. Error: 0x80040225 also when you see in the error 3 in ClientIDManagerStartup log RegTask: Server rejected registration request: 3    ClientIDManagerStartup    26/01/2012 1:07:43 AM    7904 (0x1EE0)   You might also see (not in all cases) in ccmexec.log System task ‘ClientRegistrationStartup’ returned error code 0x80040222.    CcmExec    26/01/2012 1:10:03 AM    7904 (0x1EE0) Solution: Remove the Client authentication and SMS certificates Certificates of from Certificates console and request new certificates

 

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