# License
After installing the TrueConf MCU video conferencing server, you will need to activate it with the registration key.
You can get a three-week trial, so you can try all the features and benefits of TrueConf MCU before purchasing it. Just contact us in any convenient way.
Please note that even the free version of TrueConf MCU has no limits on the duration of a conference and enables users to participate in conferences for as long as they want.
The differences between the paid and free versions of TrueConf MCU are described in the table:
| License type | Free | Premium |
|---|---|---|
| Maximum number of concurrent conference participants | 100 | Up to 250 |
| Maximum number of concurrent conferences | 4 | Unlimited |
| “TrueConf MCU Free” watermark in the upper right corner of the screen during video meetings | Yes | No |
| Connection to the registration server (via 443 TCP port) | Required | Not required |
# License information
To view information about the current license or the license agreement, and to re-register the server, go to the Administration → License menu:
