Within Lineage II, players can use the MSN Messenger service of Microsoft to chat with players on the Friends List in game as well as friends outside of the game EQ2 PLAT. Click the Messenger icon in the lower left corner of the chat window to enable MSN Messenger.

While in the game you can chat using MSN with other players registered in the Friends List without a separate MSN registration. If you log in with your MSN Messenger account through the game, you can also do multi-point chatting with other MSN users outside of the game. You can use the basic functions of MSN, such as chatting, user invitation, and status change, but functions such as file transfer or video chatting are not supported. EQ2 PLAT is a kind of special game gold.

When you play with another character and log into MSN using the same MSN account, your MSN contact list is displayed the same, but the Friends List in game is maintained by character.

If a clan leader of a clan above level 5 invites a party with the /channelinvite command or by clicking on the Channel Invitation button in the party action section of the action window (Alt+C) the command channel will be created and chat window activated. Clan members who are not clan leaders may open the command channel when the clan skill Clan Imperium is activated about EQ2 PLAT.

A maximum number of 50 parties can join one channel. The channel will automatically disband when the channel creator disbands his party. If the channel creator terminates the game unexpectedly or transfers party leader privileges to another individual, channel creator privileges are transferred to the new leader. The recipient of these privileges does not have to be a clan leader of a level 5 clan EQ2 PLAT. In other words, the prerequisite of a channel creator is a clan leader of a level 5 clan and a party leader, but merely a party leader is sufficient for subsequent channel maintenance.