Disney told employees on Thursday that it will no longer use Slack for internal communication after a hack earlier this year allowed cybercriminals to expose financial materials, computer codes, and o

A hacktivist group called NullBulge leaked data from almost 10,000 of Disney’s Slack channels in July.

Disney plans to transition away from its use of Slack as a companywide workplace collaboration system, a move that comes after a hacking entity stole and leaked online more than a terabyte of company data.