Microsoft Teams for Beginners: Chats, Channels and Meeting Limits

Chats, teams and channels: what each one is for

A chat is a conversation with one person or a small group. A team is a group of people, and channels are the topic spaces inside it, such as one channel per project. Meetings can be started from either place.

Microsoft describes three channel types. Standard channels are open to every team member and everything posted is searchable. Private channels need an invitation and keep their files in a separate SharePoint site. Shared channels are for people inside and outside your organization, and only team owners can create them. A channel cannot be converted from one type to another, so pick the type before you create it.

Free personal Teams versus a work or school plan

Microsoft's comparison table separates four offers. Teams for personal use gives unlimited chat messages, meetings of up to 60 minutes with up to 100 participants, and 5 GB of file storage. It has no meeting recordings and no breakout rooms.

Microsoft 365 Personal and Family raise the meeting length to 30 hours and the capacity to 300 participants, and add recordings. Personal includes 1 TB for one person. Family includes 6 TB, which is 1 TB for each of up to 6 people.

Work and school licenses add "Teams and channels" as a feature, plus breakout rooms and Whiteboard. For those licenses the size of a meeting depends on the plan: up to 300 people with Microsoft 365 Business Basic, Standard, Premium or Teams Essentials, and up to 1,000 with the larger Enterprise plans. Personal Teams has its own "communities and channels" instead, so the two are not the same product.

Start a free meeting link in three steps

On a computer, open the Meet tab, choose "Create a meeting link" and type a title. The link then sits under "Meeting links", where you can press Join or Share link.

On a phone, open the Meet or Chat tab, name the meeting with the pencil icon, set who can bypass the lobby and who can present, then tap "Start meeting" and "Join now". The link appears in the meeting chat for copying.

The lobby decides who waits

The lobby is the waiting area before a meeting. Under "Who can bypass the lobby" Microsoft lists 6 choices: only organizers and co-organizers; people who were invited; people in my org; people in my org and guests; people in my org, trusted orgs, and guests; and everyone. Your IT admin sets the default, and a lock symbol next to an option means it cannot be changed.

For "people who were invited", distribution lists of up to 10,000 users are supported, and forwarded invitations count as invited. In channel meetings all channel members count as invited, so they skip the lobby.

A worked example: a 25-person group chat

Say you create one chat for a 25-person club. Teams allows up to 250 people in a private chat, but only 200 can be added at the same time, so you add 200 first and the other 50 later if you ever reach 250.

At 25 people you are over a second limit: with more than 20 people, Microsoft turns off Outlook automatic replies, status messages, the typing indicator, video and audio calling, sharing and read receipts. A video or audio call started from a chat also holds only 20 people. For a call with all 25, schedule a meeting instead, where the cap is 100 on free Teams and 300 on a Business plan.

Attachments follow separate numbers: up to 10 files per message and 100 MB per file.

Numbers that decide how you organize a team

Microsoft's limits page gives the following for work and school accounts. A team holds up to 25,000 members and 100 owners. A person can belong to 1,000 teams. A team can have 1,000 channels, counting standard, private and shared ones together, and a deleted channel still counts for 30 days while it can be restored.

Private channels hold up to 5,000 members. A shared channel can be shared with up to 50 teams. Channel names cannot contain characters such as # % & * or a slash, and cannot start with an underscore or a period. Tags are capped at 200 per team and 25 per person in a team.

Shortcuts that save clicks in a meeting

Microsoft's list covers the desktop app. Hold-to-talk needs a setting switched on first: go to More options, then Settings, then Privacy, and turn on "Keyboard shortcut to unmute". It does not work in the chat box or while PowerPoint Live or Whiteboard is shared.

• Toggle mute: Ctrl+Shift+M on Windows, Command+Shift+M on a Mac.
• Temporarily unmute: hold Ctrl+Spacebar on Windows, Option+Spacebar on a Mac.
• Toggle video: Ctrl+Shift+O on Windows, Command+Shift+O on a Mac.
• Raise or lower your hand: Ctrl+Shift+K on Windows, Command+Shift+K on a Mac.
• Start a new chat: Ctrl+N on Windows, Command+N on a Mac. Search is Ctrl+E or Command+E.
• End a call: Ctrl+Shift+H on Windows, Command+Shift+H on a Mac.

Common mistakes that cause confusion

Mixing up the two products is the first one. Advice written for work accounts, such as 300 or 1,000 people, does not apply to a free personal account that stops at 100. Another is expecting a free meeting to run past 60 minutes: ask a Microsoft 365 subscriber to host instead.

Creating a private channel when you wanted a standard one cannot be undone by conversion, only by making a new channel. And files shared in a private channel are visible only to its members, so a teammate outside it will not find them. If an unfamiliar Teams error is on your screen right now, Crade can read it and explain what it means.

Who Teams suits and who it does not

Teams suits groups that already live in Microsoft 365 and want chat, files and meetings in one place; files in a team sit in SharePoint, with 250 GB allowed per uploaded file. It suits small clubs on the free plan for chat and short calls. It is a weaker fit if you regularly host one-hour sessions without a paid plan, or need recordings on the free tier, since personal Teams has none. Microsoft also retired Teams live events on June 30, 2026, and points organizers to the newer Teams events experience.