Salesforce and Slack filed a lawsuit in London's High Court on April 23, 2026 alleging Microsoft’s Teams bundling is anticompetitive.
The complaint claims Microsoft ties Teams to Office, limiting customer choice and violating competition rules, echoing a 2020 EU complaint.
Microsoft avoided a fine last year by agreeing to lower Office prices without Teams, while UK suit targets Windows Server overcharges.
Microsoft denies the allegations, stating its bundling practices comply with competition law.