Which feature allows users to improve the efficacy of a newly launched Slack instance for collaboration?

The option emphasizing continuous feedback and support channels is the most effective feature for improving the efficacy of a newly launched Slack instance for collaboration. Continuous feedback mechanisms allow users to express their experiences, challenges, and suggestions in real-time, facilitating ongoing improvements and adjustments to how Slack is utilized within the organization. This adaptability is crucial in ensuring that the tool meets the needs of its users, encourages engagement, and fosters a collaborative environment.

Additionally, support channels provide users with immediate assistance and guidance, helping them navigate the platform's features effectively. This combination of feedback and prompt support can significantly enhance user experience, leading to increased collaboration and productivity.

While the other options may offer some benefits, they do not directly contribute to fostering an effective collaborative atmosphere in the same way. Frequent password changes could improve security but may hinder usability. Integrating with Microsoft Teams introduces another tool rather than optimizing Slack itself. Mandatory reporting of channel usage could gather data but might not necessarily lead to enhanced collaboration if users are not engaged in the process of improvement. Thus, focusing on feedback and support is essential for maximizing the collaborative potential of Slack.