You can customize the default messages that appear when you send invitations to a chat in-progress or when you start an instant chat meeting. You can also edit these messages any time you send the invitation.
1. Choose File - Preferences - User Preferences.
2. Click Instant Messaging - General.
3. In the "Default text for invite to chat" field, enter the text you want to appear when you invite other people to join a chat in-progress, or when you start a chat meeting.
4. Click OK.
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