Okay, It is not related to the OEM device or not but it is related to the blank service tag. Could the motherboard be replaced? If the motherboard replacement happened and the engineer onsite didn't enter the service tag could be the reason for the blank ST. Because OME could not discover the server without a service tag. Please check ST 1. Boot up the system 2. Press to enter the System Setup  3. Review Setup information and click on Service Tag Settings 4. Enter the Service Tag. Note that you can only enter the Service Tag when the text field is empty. Ensure that you enter the correct tag as it cannot be updated or changed once entered. 5. Click OK   And you can check this article [URL] 
Hello,We installed a new openmanage enterprise in our environment.6 pieces We have a PowerEdge R730 server. I have successfully added 5 of them to openmanage enterprise.But I can't add my 1 server. I have given all the necessary network permissions.My credentials are correct. My firmware version is up to date I restarted idrac.I checked wsman link with dell emc troubleshooting tool and it is successful.I am successfully accessing via idracDespite all these attempts, I am getting the following error. Http Status : 404Operation failed.========== EEMI Code: CGEN1013 ==========Message: Unable to connect to the device over because a connection error occurred.Recommended actions: Make sure that the target device is available and retry the operation.=======================================Task Failed. Completed With Errors.   Thanks in advance for your help.  
EEMI Code: CGEN1013