LONDON, April 27 : Salesforce and its workspace messaging app Slack are suing Microsoft at London's High Court over alleged anticompetitive practices relating to its Teams app. Slack Technologies LLC and related companies filed the lawsuit on April 23, which a Slack spokesperson said was "because Microsoft's practices harmed competition, using tying and bundling of Teams to limit customer choice". Microsoft did not immediately respond to a request for comment. Slack had in 2020 complained to