Coexistence modes - Reference
- After retirement of Skype for Business Online on July 31, 2021, it is no longer possible to assign a coexistence mode other than TeamsOnly to a user homed in the cloud. As was the case prior to retirement, users homed in Skype for Business Server on-premises can be assigned any mode other than TeamsOnly.
Coexistence modes provide a simple, predictable experience for end users as organizations transition from Skype for Business to Teams. For an organization moving to Teams, the TeamsOnly mode is the final destination for each user, though not all users need to be assigned TeamsOnly (or any mode) at the same time. Prior to users reaching TeamsOnly mode, organizations can use any of the Skype for Business modes (SfBOnly, SfBWithTeamsCollab, SfBWithTeamsCollabAndMeetings) to ensure predictable communication between users who are TeamsOnly and those who aren't yet.
From a technical perspective, a user's mode governs several aspects of the user's experience:
- Incoming routing: In which client (Teams or Skype for Business) do incoming chats and calls land?
- Presence publishing: Is the user's presence that is shown to other users based on their activity in Teams or Skype for Business?
- Meeting scheduling: Which service is used for scheduling new meetings and ensuring that the proper add-in is present in Outlook? TeamsUpgradePolicy does not govern meeting join. Users can always join any meeting, whether it be a Skype for Business meeting or a Teams meeting.
- Client experience: What functionality is available in Teams and/or Skype for Business client? Can users initiate calls and chats in Teams, Skype for Business, or both? Is Teams & Channels experience available?
For more information on routing and presence behavior based on mode, see Coexistence with Skype for Business.
However, from an experience perspective, mode can be described as defining the experience for:
- Chat and Calling: Which client does a user use?
- Meeting Scheduling: Do users schedule new meetings as Teams or Skype for Business meetings?
- Availability of collaboration functionality in Teams client. Is Teams & Channels and Files functionality available while users still have Skype for Business?
The modes are listed below. Cloud users must be TeamsOnly, and users homed on-premises must be any mode other than TeamsOnly.
|Mode||Calling and Chat||Meeting Scheduling1||Teams & Channels||Use Case|
|TeamsOnly2Only possible if the user does not have an on-premises account in Skype for Business Server||Teams||Teams||Yes||The final state of being upgraded. The default for new tenants, unless a hybrid configuration is detected.|
|Islands||Either||Either||Yes||Default configuration for hybrid organizations. Allows a single user to evaluate both clients side by side. Chats and calls can land in either client, so users must always run both clients. To avoid a confusing or regressed Skype for Business experience, external (federated) communications, PSTN voice services and voice applications, Office integration, and several other integrations continue to be handled by Skype for Business.|
|SfBWithTeamsCollabAndMeetings2||Skype for Business||Teams||Yes||"Meetings First". Primarily for on-premises organizations to benefit from Teams meeting functionality, if they are not yet ready to move calling to the cloud.|
|SfBWithTeamsCollab||Skype for Business||Skype for Business||Yes||Alternate starting point for complex organizations that need tighter administrative control.|
|SfBOnly||Skype for Business||Skype for Business||No3||Specialized scenario for organizations with strict requirements around data control. Teams is used only to join meetings scheduled by others.|
1 The ability to join an existing meeting (whether scheduled in Teams or in Skype for Business) isn't governed by mode. By default, users can always join any meeting they have been invited to.
2 By default, when assigning either TeamsOnly or SfbWithTeamsCollabAndMeetings to an individual user, any existing Skype for Business meetings scheduled by that user for the future are converted to Teams meetings. If desired, you can leave these meetings as Skype for Business meetings either by specifying
-MigrateMeetingsToTeams $false when granting TeamsUpgradePolicy, or by unselecting the checkbox in the Teams Admin portal. The ability to convert meetings from Skype for Business to Teams is not available when granting TeamsUpgradePolicy on a tenant-wide basis.
3 Currently, Teams does not have the ability to disable the Teams and Channels functionality so this remains enabled for now.
TeamsUpgradePolicy exposes two key properties: Mode and NotifySfbUsers.
|Parameter||Type||Allowed values(default in italics)||Description|
|Mode||Enum||IslandsTeamsOnlySfBOnlySfBWithTeamsCollabSfBWithTeamsCollabAndMeetings||Indicates the mode the client should run in.|
|NotifySfbUsers||Bool||False or true||Indicates whether to show a banner in the Skype for Business client informing the user that Teams will soon replace Skype for Business. This can't be true if Mode=TeamsOnly.|
Teams provides all relevant instances of TeamsUpgradePolicy via built-in, read-only policies. Therefore, only Get and Grant cmdlets are available. The built-in instances are listed below.
These policy instances can be granted either to individual users or on a tenant-wide basis. For example:
- To upgrade a user ($SipAddress) to Teams, grant the "UpgradeToTeams" instance:
Grant-CsTeamsUpgradePolicy -PolicyName UpgradeToTeams -Identity $SipAddress
- To upgrade the entire tenant, omit the identity parameter from the grant command:
Grant-CsTeamsUpgradePolicy -PolicyName UpgradeToTeams
The Teams client user experience when using Skype for Business modes
When a user is in any of the Skype for Business modes (SfBOnly, SfBWithTeamsCollab, SfBWithTeamsCollabAndMeetings), all incoming chats and calls are routed to the user's Skype for Business client. To avoid end-user confusion and ensure proper routing, calling and chat functionality in the Teams client is automatically disabled when a user is in any of the Skype for Business modes. Similarly, meeting scheduling in Teams is automatically disabled when users are in the SfBOnly or SfBWithTeamsCollab modes, and automatically enabled when a user is in the SfBWithTeamsCollabAndMeetings mode. For details, see Teams client experience and conformance to coexistence modes.
- Prior to delivery of the automatic enforcement of Teams and Channels, the SfbOnly and SfBWithTeamsCollab modes behave the same.
Detailed mode descriptions
|Islands(on-premises only)||A user runs both Skype for Business and Teams side by side. This user:
|SfBOnly(on-premises only)||A user runs only Skype for Business. This user:
|SfBWithTeamsCollab(on-premises only)||A user runs both Skype for Business and Teams side by side. This user:
|SfBWithTeamsCollabAndMeetings(on-premises only)||A user runs both Skype for Business and Teams side by side. This user:
|TeamsOnly(cloud users only)||A user runs only Teams. This user:
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