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Teams is built on Microsoft 365 groups, Microsoft Graph, and the same enterprise-level security, compliance, and manageability as the rest of Microsoft 365 and Office 365. Teams leverages identities stored in Azure Active Directory (Azure AD). Teams keeps working even when you're offline or experiencing spotty network conditions. Microsoft Teams is the hub for team collaboration in Microsoft 365 that integrates the people, content, and tools your team needs to be more engaged and effective. Many users find that using an external keyboard with keyboard shortcuts for Microsoft Teams on Windows helps them work more efficiently. For users with mobility or vision disabilities, keyboard shortcuts can be easier than using the touchscreen and are an essential alternative to using a mouse. Teams presence in Outlook is supported on the Outlook 2013 desktop app and later. To learn more about presence in Teams, see User presence in Teams. Each team in Microsoft Teams has a team site in SharePoint Online, and each channel in a team gets a folder within the default team site document library.
-->Presence is part of a user's profile in Microsoft Teams (and throughout Microsoft 365 or Office 365). Presence indicates the user's current availability and status to other users. By default, anyone in your organization using Teams can see (in nearly real time) if other users are available online. Presence is updated in real time on the web and desktop versions when you refresh the page on mobile.
Note
For details about Teams user profiles on different platforms, see Teams features by platform.
Presence states in Teams
| User configured | App configured |
|---|---|
| Available | Available |
| Available, Out of Office. Note: Out of office is automatically set for the periods of time where the user sets 'automatic replies'. If the user is using the app during these periods of time, a dual presence might be shown, such as 'Out of office, available'. | |
| Busy | Busy |
| In a call | |
| In a meeting | |
| On a call, out of office | |
| Do not disturb | |
| Presenting | |
| Focusing. Focus happens when the users schedule focus time in MyAnalytics/Insights in their calendars. | |
| Away | Away |
| Away Last Seen time | |
| Be right back | |
| Appear offline | Offline. When users aren't logged in on any of their devices for a few minutes, they appear offline. |
| Status unknown | |
| Out of Office. Out of Office is used when an automatic reply is set. (Available in Outlook only.) |
Note
For users that there mailbox is hosted onprem it is expected to have presence delays with a maximun of an hour.App-configured presence states are based on user activity (Available, Away), Outlook calendar states (In a meeting), or Teams app states (In a call, Presenting). When you're in focus mode based on your calendar, Focusing will be the state people see in Teams. Focus mode will display as Do not disturb in other products.
Your current presence state changes to Away when you lock your computer or when your computer enters idle or sleep mode. On a mobile device, your presence status changes to Away whenever the Teams app is in the background.
Users receive all chat messages sent to them in Teams regardless of their presence state. If a user is offline when someone sends them a message, the chat message appears in Teams the next time the user is online. If a user state is set to Do not disturb, the user will still receive chat messages, but banner notifications aren't displayed.
Users receive calls in all presence states except for Do not disturb, in which incoming calls go to voicemail. If the recipient blocked the caller, the call won't be delivered and the caller sees the recipient's presence as Offline.
Users can add people to their priority access list by going to Settings > Privacy in Teams. People who have priority access can contact the user even when the user's status is set to Do not disturb.
Dual presence
The way presence works for most users is motivated by the events in the calendar or device events, such as a call. The user can override this status in the UI by manually setting states, which have some expiration time.
User configured states expiration
When a user selects a specific presence state, it takes precedence over any app activity update. For example, if a user sets herself as Do not disturb, her presence will remain as Do not disturb even if she attends a meeting or answers a call.
User configured states have default expiration settings in Teams, in order to prevent users from displaying a status that may not be relevant after a period of time.
| User configured state | Default expiration |
|---|---|
| Busy | 1 day |
| Do not disturb | 1 day |
| Others | 7 days |
Note
A user can also configure manually a duration for her presence. For instance, a user can set herself as Appear offline until tomorrow morning.
Admin settings in Teams compared to Skype for Business
The following admin settings Skype for Business are different in Teams:
- In Teams, presence sharing is always enabled for users in the organization. Privacy (where you define who can see presence) configuration isn't available in Teams.
- Presence sharing with everyone (including Federated services) is always enabled for users in Teams. Their contact list (if they had one in Skype for Business) is visible under Chat > Contacts or under Calls > Contacts.
- Client Do Not Disturb and Breakthrough features are always enabled for users in Teams.
- Calendar (includes out of office and other calendar information) integration is always enabled for users when Teams is integrated with Outlook.
- The Last seen or Away since indicator is always enabled for users in Teams if the organization also uses Skype for Business.
Note
The ability of a Teams admin to customize these settings is not currently supported.
Admin settings in Teams compared to Microsoft Outlook
Teams presence in Outlook is supported on the Outlook 2013 desktop app and later for contacts in the same organization.
If the upgrade mode policy of the user account is set to TeamsOnly, Outlook talks to Teams to get presence. If the user account isn't set to TeamsOnly, then Outlook talks to Skype for Business.
Coexistence with Skype for Business
See Coexistence with Skype for Business for details on how Teams presence functions when your organization also uses Skype for Business.
-->This article describes some of the limits, specifications, and other requirements that apply to Teams.
Teams and channels
| Feature | Maximum limit |
|---|---|
| Number of teams a user can create | Subject to a 250 object limit¹ |
| Number of teams a user can be a member of | 1,000² |
| Number of members in a team | 25,0006 |
| Number of owners per team | 100 |
| Number of org-wide teams allowed in a tenant | 5² |
| Number of members in an org-wide team | 10,000 |
| Number of teams a global admin can create | 500,000 |
| Number of teams a Microsoft 365 or Office 365 organization can have | 500,000³ |
| Number of channels per team | 200 (includes deleted channels)4 |
| Number of Private channels per team | 30 (includes deleted channels)4 |
| Number of members in a Private channel | 250 |
| Maximum size of distribution list, security group or Office 365 group that can be imported in to a team | 3,500 |
| Maximum number of members in an Office 365 group that can be converted to a team | 10,0006 |
| Channel conversation post size | Approximately 28 KB per post5 |
1 Any directory object in Azure Active Directory counts towards this limit. Global admins are exempt from this limit, as are apps calling Microsoft Graph using application permissions.
2 This limit includes archived teams.
3 To further increase the number of teams, you must contact Microsoft support and request further increase to the number of Azure Active Directory objects in your tenant. Increase is only made for real-life production scenarios.
4 Deleted channels can be restored within 30 days. During these 30 days, a deleted channel continues to be counted towards the 200 channel or 30 private channel per team limit. After 30 days, a deleted channel and its content are permanently deleted and the channel no longer counts towards the per team limit.
5 28 KB is an approximate limit because it includes the message itself (text, image links, etc.), @-mentions, number of connectors, and reactions.
6 Teams in GCC can accommodate 25,000 members but teams in GCCH/DoD can only accommodate 2,500 members. Further note that teams/channel mentions are blocked in teams with over 10,000 members.
Messaging
Chat
Users who participate in conversations that are part of the chat list in Teams must have an Exchange Online (cloud-based) mailbox for an admin to search chat conversations. That's because conversations that are part of the chat list are stored in the cloud-based mailboxes of the chat participants. If a chat participant doesn't have an Exchange Online mailbox, the admin won't be able to search or place a hold on chat conversations. For example, in an Exchange hybrid deployment, users with on-premises mailboxes might be able to participate in conversations that are part of the chat list in Teams. However, in this case, content from these conversations isn't searchable and can't be placed on hold because the users don't have cloud-based mailboxes. (For more, see How Exchange and Microsoft Teams interact.)
Teams chat works on a Microsoft Exchange backend, so Exchange messaging limits apply to the chat function within Teams.
| Feature | Maximum limit |
|---|---|
| Number of people in a private chat1 | 2502 |
| Number of people in a video or audio call from chat | 20 |
| Number of file attachments3 | 10 |
| Chat size | Approximately 28 KB per post4 |
1 If you have more than 20 people in a chat, the following chat features are turned off: Outlook automatic replies and Teams status messages; typing indicator; video and audio calling; sharing; read receipts. The 'Set Delivery Options' button (!) is also removed when private group chats contain more than 20 members.
2 Only 200 members at a time can be added to a group chat. See this article for more information.
3 If the number of attachments exceeds this limit, you'll see an error message.
4 28 KB is an approximate limit because it includes the message itself (text, image links, etc.), @-mentions, and reactions.
Emailing a channel
If users want to send an email to a channel in Teams, they use the channel email address. When an email is part of a channel, anyone can reply to it to start a conversation. Here are some of the applicable limits for sending email to a channel.
| Feature | Maximum limit |
|---|---|
| Message size1 | 24 KB |
| Number of file attachments2 | 20 |
| Size of each file attachment | Less than 10 MB |
| Number of inline images2 | 50 |
1 If the message exceeds this limit, a preview message is generated and the user is asked to download and view the original email from the link provided.
2 If the number of attachments or images exceeds this limit, you'll see an error message.
For more information, see Exchange Online limits.
Note
Message size, file attachments, and inline images limits are the same across all Microsoft 365 and Office 365 licenses. Emailing a channel is not available in Teams for Office GCC/GCCH/DOD organizations.
Channel names
Channel names can't contain the following characters or words:
| Type | Example |
|---|---|
| Characters | ~ # % & * { } + / : < > ? | ' ' , .. |
| Characters in these ranges | 0 to 1F 80 to 9F |
| Words | forms, CON, CONIN$, CONOUT$, PRN, AUX, NUL, COM1 to COM9, LPT1 to LPT9, desktop.ini, _vti_ |
Channel names also can't start with an underscore (_) or period (.), or end with a period (.).
Meetings and calls
Important
Microsoft 365 live event limit increases
To continue supporting our customers' needs, through June 30, 2021, we will extend temporary limit increases for live events, including:
- Event support for up to 20,000 attendees
- 50 events can be hosted simultaneously across a tenant
- Event duration of 16 hours per broadcast
Additionally, Live Events with up to 100,000 attendees can be planned through the Microsoft 365 assistance program. The team will assess each request and work with you to determine options that may be available. Learn more.
| Feature | Maximum limit |
|---|---|
| Number of people in a meeting (can chat and call in) | 300. View-only allows for up to 10,000 listen-only participants to join a meeting in which the organizer has a license for E3/E5/A3/A5 SKU, as well as, Government (GCC, GCC High, DoD). Learn more about the View-only experience. |
| Number of people in a video or audio call from chat | 20 |
| Max PowerPoint File Size | 2GB |
| Teams keeps meeting recordings that don't get uploaded to Microsoft Stream, available for local download | 20 days |
Meeting expiration
Note
A meeting URL will never stop working. The expiry only relates to any PSTN dial-in numbers and/or underlying meeting policies and settings.
| Meeting type | Meeting expires after this much time | Each time you start or update a meeting, expiration extends by this much time |
|---|---|---|
| Meet now | Start time + 8 hours | N/A |
| Regular with no end time | Start time + 60 days | 60 days |
| Regular with end time | End time + 60 days | 60 days |
| Recurring with no end time | Start time + 60 days | 60 days |
| Recurring with end time | End time of last occurrence + 60 days | 60 days |
Note
Microsoft Teams meetings have a time limit of 24 hours.
Teams Live Events
| Feature | Maximum limit |
|---|---|
| Audience size | 10,000 attendees |
| Duration of event | 4 hours |
| Concurrent Live Events running in a Microsoft 365 or Office 365 organization 1 | 15 |
Ms Office Teams Meeting
1 You can schedule as many Live Events as you want, but you can only run 15 at a time. As soon as the producer joins a live event, it's considered to be running. The producer who attempts to join the 16th live event gets an error.
For more information about live events and a comparison of Teams live events to Skype Meeting Broadcast, go to Teams live events and Skype Meeting Broadcast. See also Schedule a Teams live event.
Important
Microsoft 365 live event limit increases
To continue supporting our customers' needs, through June 30, 2021, we will extend temporary limit increases for live events, including:
- Event support for up to 20,000 attendees
- 50 events can be hosted simultaneously across a tenant
- Event duration of 16 hours per broadcast
Additionally, Live Events with up to 100,000 attendees can be planned through the Microsoft 365 assistance program. The team will assess each request and work with you to determine options that may be available. Learn more.
Presence in Outlook
Teams presence in Outlook is supported on the Outlook 2013 desktop app and later. To learn more about presence in Teams, see User presence in Teams.
Storage
Each team in Microsoft Teams has a team site in SharePoint Online, and each channel in a team gets a folder within the default team site document library. Files shared within a conversation are automatically added to the document library, and permissions and file security options set in SharePoint are automatically reflected within Teams.
Note
Each private channel has its own SharePoint site (previously called 'site collection').
Ms Office Teams Download
If you don't have SharePoint Online enabled in your tenant, Microsoft Teams users cannot always share files in teams. Users in private chat also cannot share files because OneDrive for Business (which is tied to the SharePoint license) is required for that functionality.
By storing the files in the SharePoint Online document library and OneDrive for Business, all compliance rules configured at the tenant level will be followed. (For more, see How SharePoint Online and OneDrive for Business interact with Microsoft Teams.)
Because Teams runs on a SharePoint Online backend for file sharing, SharePoint limitations apply to the Files section within a Team. Here are the applicable storage limits for SharePoint Online.
| Feature | Microsoft 365 Business Basic | Microsoft 365 Business Standard | Office 365 Enterprise E1 | Office 365 Enterprise E3 | Office 365 Enterprise E5 | Office 365 Enterprise F1 |
|---|---|---|---|---|---|---|
| Storage | 1 TB per organization plus 10 GB per license purchased | 1 TB per organization plus 10 GB per license purchased | 1 TB per organization plus 10 GB per license purchased | 1 TB per organization plus 10 GB per license purchased | 1 TB per organization plus 10 GB per license purchased | 1 TB per organization |
| Storage for Teams Files | Up to 25 TB per site or group | Up to 25 TB per site or group | Up to 25 TB per site or group | Up to 25 TB per site or group | Up to 25 TB per site or group | Up to 25 TB per site or group |
| File upload limit (per file) | 100 GB | 100 GB | 100 GB | 100 GB | 100 GB | 100 GB |
Channels are backed by folders within the SharePoint Online site (previously called 'site collection') created for the team, so file tabs within Channels share the storage limits of the team they belong to.
For more information, see SharePoint Online limits.
Class teams
Microsoft Teams for Education provides templates designed for unique education scenarios, such as classroom teaching. More information about team types, including class teams, is available in Choose a team type to collaborate in Microsoft Teams.
What Is Ms Office Teams
A class team is a template type with additional apps included, and with limits separate to the number of team members.
Note
Using class teams requires an Office 365 Education license.
Limits for class teams are listed in the following table:
Ms Office Teams 365
| Feature | Maximum limit |
|---|---|
| Number of members in a team | See the Teams and channels section of this article |
| Number of members to use Assignments in a class team | 200 |
| Number of members to use a OneNote Class Notebook in a class team | 200 |
A class team can support more than 200 members. However, if you plan to use either the Assignments app or Class Notebook app within your team, you will need to keep the number of members below the maximum limits above.
Tags
| Feature | Maximum limit |
|---|---|
| Number of tags per team | 100 |
| Number of suggested default tags per team | 25 |
| Number of team members assign to a tag | 100 |
| Number of tags assigned to a user per team | 25 |
Contacts
Teams uses these contacts:
- Contacts in your organization's Active Directory
- Contacts added to the user's Outlook default folder
Ms Office Teams Meeting
Teams users can communicate with anyone in your organization's Active Directory and can add anyone in your organization's Active Directory as a contact and to their contact lists by going to Chat > Contacts or Calls > Contacts.
Teams users can also add a person who isn't in your organization's Active Directory as a contact by going to Calls > Contacts.
Browsers
Teams fully supports the following Internet browsers, with noted exceptions for calling and meetings. This table applies to operating systems running on desktop computers.
| Browser | Calling - audio, video, and sharing | Meetings - audio, video, and sharing123 |
|---|---|---|
| Internet Explorer 11 | Not supported | Meetings are supported only if the meeting includes PSTN coordinates. To attend a meeting on IE11 without PSTN coordinates, users must download the Teams desktop client. Video: Not supported Sharing: Incoming sharing only (no outgoing) Microsoft 365 apps and services will not support Internet Explorer 11 starting August 17, 2021 (Microsoft Teams will not support Internet Explorer 11 earlier, starting November 30, 2020). Learn more. Please note that Internet Explorer 11 will remain a supported browser. Internet Explorer 11 is a component of the Windows operating system and follows the Lifecycle Policy for the product on which it is installed. |
| Microsoft Edge, RS2 or later | Fully supported, except no outgoing sharing4 | Fully supported, except no outgoing sharing |
| Microsoft Edge (Chromium-based), the latest version plus two previous versions | Fully supported | Fully supported |
| Google Chrome, the latest version plus two previous versions | Fully supported | Fully supported Sharing is supported without any plug-ins or extensions on Chrome version 72 or later. |
| Safari 14+ | 1:1 calls not supported. Group calls fully supported. Video: Fully supported Sharing: Fully supported | Meetings: Fully supported Video: Fully supported Sharing: Fully supported |
| Safari 13.1+ | 1:1 calls not supported. Group calls supported with full audio support. Video: Incoming only Sharing: Fully supported | Meetings are supported with full audio support. Video: Incoming only Sharing: Fully supported |
| Firefox, the latest version plus two previous versions | Not supported | Meetings are supported only if the meeting includes PSTN coordinates. To attend a meeting on Firefox without PSTN coordinates, users must download the Teams desktop client. Video: Not supported Sharing: Incoming sharing only (no outgoing) |
| Safari versions before 13 | Not supported | Meetings are supported only if the meeting includes PSTN coordinates. To attend a meeting on Safari without PSTN coordinates, users must download the Teams desktop client. Video: Not supported Sharing: Incoming sharing only (no outgoing) Safari is enabled on versions higher than 11.1 in preview. While in preview, there are known issues with Safari's Intelligent Tracking Prevention. |
1 To give and take control of shared content during sharing, both parties must be using the Teams desktop client. Control isn't supported when either party is running Teams in a browser. This is due to a technical limitation that we're planning to fix.
2 Blur my background isn't available when you run Teams in a browser. This feature is only available in the Teams desktop client.
3 Teams meetings on browsers are limited to a single incoming video feed of active speaker.
4 Edge RS2 or later doesn't support sending real-time audio and video traffic through HTTP proxies.
Note
Download Microsoft Teams
As long as an operating system can run the supported browser, Teams is supported on desktop computers. For example, running Firefox on the Linux operating system is an option for using Teams.
For mobile operating systems, we recommend that you run the Teams app, available from the Android and iOS stores. Running Teams in a mobile operating system is supported, but many features are unavailable.
Operating systems
For information about operating system requirements, see Get clients for Microsoft Teams.