Dear Jim,
I tried to enable the services. But got the below error message.
[PS] D:\Exchange>Import-ExchangeCertificate -Path C:\Certi\d10f1aa6aaf666a9.crt
Thumbprint Services Subject
---------- -------- -------
E120DFC9E812B8E3B3624AA6C04EC108F4EA7AC0 ..... CN=webmail.ocimumbio.co...
[PS] D:\Exchange>Enable-ExchangeCertificate -Thumbprint E120DFC9E812B8E3B3624AA6
C04EC108F4EA7AC0 -Services "SMTP, IMAP, IIS"
Enable-ExchangeCertificate : The certificate with thumbprint E120DFC9E812B8E3B3
624AA6C04EC108F4EA7AC0 was found but is not valid for use with Exchange Server
(reason: PrivateKeyMissing).
At line:1 char:27
+ Enable-ExchangeCertificate <<<< -Thumbprint E120DFC9E812B8E3B3624AA6C04EC108
F4EA7AC0 -Services "SMTP, IMAP, IIS"
[PS] D:\Exchange>