After one massive flow e financial and strategic data this summer via Slack, Disney has decided it's more of a Microsoft Teams player.

A internal memo obtained by Business Insider on Thursday confirms that Disney is moving away from Slack on a company-wide basis. Most Disney employees will leave Slack by the end of the first quarter of fiscal 2025, ending in the end of December 2024. All of them will leave the messaging platform by the second quarter of 2025.

^{The Walt Disney logo. Photo: RONDA CHURCHILL/AFP via Getty Images}

According to the memounspecified “collaboration tools” will replace Slack. Disney employees are already beginning to think about a possible move to Microsoft Teams, with an employee who writes“The team is terrible.”

Disney's decision to ban Slacking follows the leak of over a terabyte of sensitive company data earlier this summer. According to Wall Street Journala hacker group called NullBulge released over 44 million Slack messages, 18,800 spreadsheets and 13,000 PDFs specific to Disney's strategy, finances and operations.

The data included Disney's plans for AI powered recommendationstracking of interior panels theme park revenueand passport numbers for Disney Cruise Line employees.

Related: Here's how Disney plans to use AI to grow a $16 billion business

NullBulge claimed to be able to retrieve every message and file from nearly 10,000 Disney Slack channels with the help of a Disney insider. He also says his motivation is to protect artists' rights and promote fair compensation.

Hen Amartely, director of product marketing at cybersecurity company Do Control, wrote that organizations can learn from the Disney data breach by keeping sensitive information, especially secret information like account credentials, out of Slack. Amartely also recommends watching out for unusual activities and behavior from insiders.

Disney is not the first to leak internal Slack messages. Uber had an incident in September 2022 as well Twitter, now X, in July 2020 that began with the hacker breaking into the company's servers by first infiltrating a Slack account.

Related: Disney's internal Slack messaging data leaked in the latest hack targeting a major company