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This problem (Could not recognize the HTTP return code: HTTP/1.1 500 Internal Server Error) is known when the agent is installed on a Microsoft Internet Security and Acceleration (ISA) server. Are you running an Microsoft Internet Security and Acceleration (ISA) server.
Common Management Agent communications to the ePO server fail when installed on a Microsoft ISA Server
I am not running a Microsoft Internet Security and Acceleration (ISA) server - it just running file and print serving.
Try to reinstall the ePO agent on the affected clients. I don't have any suggestions anymore. I suggest you should create an support case at McAfee Support.
I too have this problem. I had to reinstall my server (from the OS up)...and connected back to the original DB(on another server). Now it shows the clients list in the DB and all of the setting...I just cannot have them communicate.
Service call is in place, but if anyone has a suggestion?!
error: Unexpected HTTP response code 500 received from remote computer
Was having this problem repeatedly and the only way around it was to re-execute FramePkg.exe on each client -- sometimes repeatedly in order to get it to send properties back to the ePO server. Found that by rebooting the ePO server and then ensuring that the BITS service was started on it that the agents then began reporting back in again.
-------------------------------yes, I am quoting myself grin --------------------------------
This is what resolved our issue:
In this case if you have OLD ePO server installed folder backup then you can recover this key from the below mentioned path of the ePO installed folder.
x:\Program Files\McAfee\ePolicy Orchestrator\DB\Keystore\sr*.zip
You need to import the key to the new installed ePO server, in case if you don’t have the above mentioned key backed up then the only option is to reinstall the agent to the client machine.
1. Go to Configuration | Server Settings on each server in your environment, select
Security Keys in the Setting Categories list, then click edit
2. Click Import, next to Import and back up keys. The Import Keys dialog box appears
3. Browse to the location containing the exported ZIP files, select one, and then click next
4. Verify this is the desired master repository public key, then click Save