C Tech employs a single license server which supports the following products:
- Earth Volumetric Studio (EVS) Enterprise Licenses
- Earth Volumetric Studio Floating Licenses
- EnterVol for ArcGIS Concurrent and Enterprise Licenses (legacy product)
Info
- EVS Fixed licenses do not require installation of the C Tech Universal License Server.
- License management is performed using the C Tech License Manager.
- For EnterVol for ArcGIS license server information, see Legacy Product Support > EnterVol License Server.
- A reboot may be required.
The C Tech Universal License Server installer also includes the C Tech License Manager. The EVS installer includes it as well.
Before Proceeding
Warning
The minimum versions supported are Windows 11 x64 and Windows Server 2022 x64.
You need Administrator rights to install.
A system reboot may be required to complete the installation.
- You must make sure the network ports used by the license server are not blocked.
- Earth Volumetric Studio 2020 and newer versions use port 9348
- Older Earth Volumetric Studio and MVS releases use port 9346
- These ports are not user configurable; they are hard coded.
- If you used C Tech software before 2020, you must uninstall your old license servers first. The new installer will not continue if any old servers are still installed. See Required Uninstalls of C Tech’s Legacy Servers for details.
Once you have completed these steps, run the installer. After it finishes, you can verify the C Tech Universal License Server is installed and running by checking the Windows Services program:
You should also check that the C Tech License Manager can connect to the license server:
For more information on how to check the license server’s status, see License Updates
Cloud Server Installation For Enterprise Customers
Some Enterprise customers run the C Tech Universal License Server on cloud platforms such as Azure and AWS.
USB license keys must still be accessible through a USB port. Some customers have solved this using USB redirection devices (such as AnywhereUSB). Enterprise USB license keys can be used with virtual machines to serve licenses to your users.
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Software based licensing is also available for cloud installation. Contact C Tech support for more information.
See Requesting Enterprise Software Licenses for how to obtain your System Identifier and request a license.
Next Step: Configure Client Machines
Installing the C Tech Universal License Server only sets up the server. You must also set up each user’s computer to connect to it:
- Install Earth Volumetric Studio on each client machine.
- Install the Earth Volumetric Studio Sample Projects for each user on each client machine.
- In the C Tech License Manager, set up each client computer to connect to this server by entering its name or address.
See Floating or Enterprise License Client Installation for step-by-step client configuration instructions.

