
Seamless Integration with Office 365 - Microsoft Teams is built into the Office 365 suite and offers seamless integration with Office 365 applications like Word, Excel, PowerPoint, OneNote, and SharePoint. It allows users to work on documents right within the app, avoiding the need to switch tools.

Rich Call and Meeting Features - Microsoft Teams provides comprehensive meeting and calling capabilities like scheduling, screen sharing, meeting recording, live captions, background blur, breakout rooms, and hands-free joining through Cortana voice assistance.

Customizable and Extensible - Microsoft Teams is highly customizable and allows organizations to add tabs for frequently used documents, integrate third-party apps and services, and build custom applications and automate workflows with Power Apps, Power BI, and Power Automate.

Intelligent Communications - It's a hub for Microsoft's vision for Intelligent Communications, which combine traditional forms of communication with AI and data insights. This includes features like inline message translation that breaks language barriers and the ability to search for content within conversation threads.

Teams and Channels - Microsoft Teams structures communication around teams and channels. Every department, project, or group can have a dedicated team and within a team, there can be numerous channels covering specific topics, which makes communication more organized and context-based.

Overly Complex Interface: Microsoft Teams has a bloated and complex interface that can be difficult to navigate for new users. This high learning curve can slow the adoption and frustrate some users.

Poor Integration with Non-Microsoft Tools: While Microsoft Teams integrates well with Office 365, the integration with other non-Microsoft tools is often less seamless which can lead to reduced productivity.

Limited File Syncing: Microsoft Teams doesn't allow file syncing across multiple channels. This means the same document can't be shared across various teams or channels, creating redundancy when sharing files.

Lack of Detailed Notifications: Microsoft Teams can often bombard users with continuous notifications without really specifying their relevance. This can be distracting and can make identifying priority tasks difficult.

Inefficient Guest User Experiences: Microsoft Teams can be confusing and cumbersome for guest users (external collaborators not part of your organization) as it often requires them to create a new account or login via other existing Microsoft accounts which can disrupt smooth collaboration.