In Teamspeak 3, you have the ability to set custom icons for a group or channel. Here’s how you do it:
Right-click on the channel for which you want to set an icon.
Click on Channel Permissions.
In the permissions browser, open the permissions of the group. Once you’ve done that, the following structure will appear: Information Create Modify Delete Icon ID Maximum Icon File Size Manage Icons
Double-click on the “Icon ID” permission, and a new window will open. It’s important to double-click on the VALUE field.
In this window, you can choose an icon or even upload your own custom icon. Once you’ve selected your icon, simply double-click on it. The icon will now appear to the right of the channel.