Hello Mukunthan Damodharan,
this means that the SSL Server Certificate has not his fully quallified name in the subject alternative name extension of the X.509 certificate.
You can create a valid one or disbale that check in the Secure Login Client.
How does the configuration gets to the clients?
With the Policy Download you can disable that check over the Secure Login Server Administration console in the corresponding authentication profile.
If manually you can change the following registry key:
[HKEY_LOCAL_MACHINE\SOFTWARE\Policies\SAP\SecureLogin\profiles\<profile name>
"sslHostAlternativeNameCheck"=dword:00000000
the value 0 disable that check on the client.
best regards
Alexander Gimbel