Many teams at Disney—which employs about 220,000 people—have already started transitioning to other collaboration tools, according to the memo. By the end of Q1 2025, Disney will have transitioned off Slack, but some “more complex use cases” may not be completed until the end of the subsequent quarter, the memo said.

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