Under Target , click or Add Groups to select the target servers. Under Trigger , set the invocation to As soon as possible .
: Choose Use a purchased License Key in the activation screen.
For servers that never connect to the internet, offline activation using a license file is available.
: Ensure all other antivirus software is uninstalled before installation.
You will see your current status (e.g., “Trial version” or “Not activated”). Click the green Activate product button. eset server security license key install
This method is suitable for individual servers that are not managed by a central console like ESET PROTECT.
Open ESET Server Security on the isolated server, go to , and choose Offline File .
Ensure the license is not being used on more servers than allowed by your subscription.
If you encounter any issues during the installation process, here are some common problems and their solutions: Under Target , click or Add Groups to
If you are installing for the first time or activating locally on the server:
| | Windows Server | Linux Server | Why It Matters | |---|---|---|---| | System Updates | Install latest Windows updates and service packs | Run sudo apt update && sudo apt upgrade or equivalent | Prevents conflicts with outdated system components | | Remove Conflicting Security Software | Uninstall other antivirus products via Settings → Apps | Remove other AV solutions using vendor-specific tools | Prevents performance conflicts and system instability | | Verify System Resources | 256 MB free RAM, 700 MB disk space, x64 processor | Same minimum requirements as Windows | Ensures smooth installation and operation | | Backup Critical Data | Full system backup recommended | Configuration files and data backup | Provides rollback capability if issues occur | | Internet Connectivity | Active connection required for online activation | Active connection for activation and updates | Required for license validation and module downloads |
Click Help and Support from the left-hand menu, then select Activate Product or Change License .
A new window will appear presenting several activation options. Select . For servers that never connect to the internet,
Double-check for typos. It is best to copy and paste the key directly from your confirmation email to avoid confusing "0" (zero) with "O" (letter).
Log into ESET Business Account and deactivate old or decommissioned servers to free up a seat. Alternatively, upgrade your license seat count. Verifying Your Activation Status
The key was entered incorrectly, has expired, or is not meant for ESET Server Security.
ESET Server Security License Key Install: A Complete Deployment Guide
Error: "Could Not Establish Connection to the Activation Server"