Archived chats are limited to 100 transactions or to 20 minutes of chat - A transaction is counted each time a user sends a new conversation line or hits Return on Messenger.
Chat through instant messages
If you're getting pop-up windows for chat messages in your Yahoo Mail account, you're most likely receiving offline chat messages. These can be requests from friends who want to be added to your online contacts list. Or they can be spam messages from people you don't know.
Are you chatting with someone on an older version of Yahoo Messenger? Certain features won't work when chatting with someone who is does not have the latest version of Yahoo Messenger.
Limit for conversations . Maximum conversations allowed in Yahoo Messenger. You may have up to 100 separate conversations at the same time.
Select Report Abuse Transcripts of the conversation will be attached and sent for investigation by our abuse team. No longer in the conversation window?
Facebook has discontinued some of the technology used by products like Yahoo Messenger which allowed features like Facebook chat and status sharing to work outside of Facebook, so those features are no longer available through Yahoo Messenger. Their decision doesn't affect anything else in Yahoo Messenger though, so you can still use it to connect with the rest of your friends, colleagues, and other contacts.