Why did you remove the certificates on the mgmt server?

Do you have any backup?

No I dont have any backup. Is there any way I can generate the same again. Like I did: ovcm -newcacert and it gave me this:

---------------------------------------------------------
| Trusted Certificates:                                   |
|     CA_3f973d92-a9e5-7573-1129-a1c6f9d0225f (*)         |
---------------------------------------------------------

No I dont have any backup. Is there any way I can generate the same again. Like I did: ovcm -newcacert and it gave me this:

---------------------------------------------------------
| Trusted Certificates:                                   |
|     CA_3f973d92-a9e5-7573-1129-a1c6f9d0225f (*)         |
---------------------------------------------------------

Follow the below steps (Execute all of the below on the OMW mgmt Server) :

(1) ovcm -newcert (you have executed this already, so skip this)

(2) ovcert -exporttrusted -file c:/tmp/cert1 -ovrg server

(3)  ovcert -importtrusted -file c:/tmp/cert1

(4) Make the note of the output of the following command : 

      ovcoreid –ovrg server

(5) ovcm -issue -file c:/tmp/cert2 -name OMW_Server_Hostname -coreid <Output of step4>

(6) ovcert -importcert -file c:/tmp/cert2 -ovrg server ( Once entered it will ask for the password, enter the password which you gave in Step5)

(7) Make the note of the output of the following command : 

      ovcoreid

(8) ovcm -issue -file c:/tmp/cert3 -name OMW_Server_Hostname -coreid <Output of step7>

(9) ovcert -importcert -file c:/tmp/cert3 ( Once entered it will ask for the password, enter the password which you gave in Step8)

Step 5 is giving error as:

C:\Users\hp-ove-deleg-user>ovcm -issue -file c:\agentcert -name <hostname> -coreid 3f973d92-a9e5-7573-1129-a1c6f9d0225f
       * Enter password: *********
       * Retype password: *********
ERROR:   Unknown Error.

C:\Users\hp-ove-deleg-user>

Running cmd as admin, changed from c:\ to d:\, still same error:

d:\>ovcm -issue -file d:\cert -name <hostname>-coreid 3f973d92-a9e5-7573-1129-a1c6f9d0225f
       * Enter password: *********
       * Retype password: *********
ERROR:   Unknown Error.

d:\>

I believe issue is with the certificate server, thats why its not able to issue certificates.

did this already, but no luck.

Also give a try of the ovowcsacm command