ESET license keys are not bind to version, but to a product / product tier better said.
Usually the packs for the endpoints cover EFSW as well, but I would rather check it with your local sales team.
EFSW is the product recommended for use on the terminal servers.
When it comes to licensing, they are a special case as they should have a license covering the terminal sessions so again I would recommend to check this with your local sales team...
Getting rid of the legacy v4 products is a must. These products are not compatible with modern operating systems and provide substantially weaker protection against malware.
1. A valid license entitles you to download, activate and update any version of the product that you've purchased. We strongly recommend to use the latest version because it addresses issues known from older versions and often bring other improvements, such as new protection features, performance improvements, etc. On a file server you should install the latest ESET File Security v7.1. On clients ESET Endpoint Antivirus 7.3.2039.
A correct procedure for upgrading v4 to v7 is as follows:
- uninstall v4
- reboot the server
- install the latest version of the security product.
Upgrades of v7 to newer versions are easier and you can install v7 on top of an older v7. Also we are going to make program updates available to business products most likely later this year.
2. The successor of ESET Endpoint Antivirus 4 BE is ESET Endpoint Antivirus v5 which is now obsolete as well. For file servers we had ESET File Security v4.
3. ESET NOD32 Antivirus 4 Business Edition is at the same category with ESET Endpoint Antivirus. In order to use ESET Endpoint Security which contains also a firewall and antispam you'd need to have a license for that product (it's possible to upgrade EEA licenses to EES).
4, There are no specific requirements for the server except those listed at https://help.eset.com/efsw/7.1/en-US/system_requirements.html.
Also I'd like to bring ESET Dynamic Threat Defense into your attention which is an extension of our security products. It provides cloud-based analysis of files to ensure instant response to new threats within your organization and substantially improves protection from ransowmare and other malware.