MSN mandatory upgrade within two months without a new version can not chat

Microsoft plans to take two months to gradually upgrade Messenger users around the world to its latest stable version of Messenger 9.0. After the version upgrade is complete, users of Messenger clients of other versions need to upgrade to the latest version 9.0 before logging in to the MSN service. In other words, if you don't use the latest version, you won't be able to chat on MSN.