Why should you migrate to Teams?
- Features and capabilities
- User experiences
- Operational performance
Upgrade (or "Migration") Objectives
- Enable SfB (on-prem or Online) users to move to Teams
- Provide interop between users who have SfB and those with Teams
The "Teams-Only" mode sets the SfB client in a "meetings only" mode.
Scenario: Full Side by Side Approach
Run both clients at the same time and the user will have a choice for each interaction. Have both meeting "buttons" in Outlook. (Can be confusing for users.)
Scenario: Teams-Only Experience
The user will only run the Teams client, but a "disabled" Skype for business client will remain installed in order to join Skype for business meetings hosted at other organizations. Incoming chat messages will arrive in Teams.
Scenario: Meetings First
For on on-prem & hybrid organizations, that will move to Meetings First before going Teams Only. Meetings first is a configuration that allows organizations to use Skype for business for instant messaging and calling and Microsoft Teams for meetings. The user will run both clients, but with no overlap in functionality. The chat and calling tabs will be removed in Teams and even the "Teams and channels" tab can be removed. Users will then have all their meetings in Teams with all the benefits of the global infrastructure, recording, transcription, etc. The on-premises versions supported are Lync Server 2013, Skype for business 2015 or 2019. (Please see BRK3124 for more information.)
Interoperability: Teams uses https and Skype for business SIP. In the cloud there is a gateway that lets them communicate. However, this only works for Skype for business Online users and even the Teams users will get a Skype for business Online shadow account. The Skype for business user must be homed online and this can of course be accomplished with a hybrid configuration. Currently this interoperability is one-to-one only. In the future this will change so that a meeting will start and both users will automatically be added to the meeting giving them richer collaboration options. In Skype for business a yellow banner will show up indicating that this is conversation over the SfB - Teams gateway. (There is also an update post Ignite about presence in coexistence modes found here: Presence now respects a user's coexistence mode.)
It is possible to upgrade without overlapping functionality.
Interoperability and co-existence are managed in the Teams Admin center of via PowerShell. Some aspects of some modes are not yet fully implemented but should come in preview later this year.
A hybrid configuration is a requirement to upgrade Skype for business users to Teams. Users can start from scratch in Teams, but hybrid is required to move a SfB user to Teams. With Skype for business Server 2019 and/or CU8 for Skype for business Server 2015 there is a new –MoveToTeams switch in the Move-CsUser command.
Move-CsUser -Identity email@example.com -Credential $cred -Target sipfed.online.lync.com -MoveToTeams -BypassAudioConferencingCheck -BypassEnterpriseVoiceCheck
An upgrade to teams can be "IT Admin-driven" or "Microsoft-driven automated" and the big difference is really how the migration is initiated.
Will these upgrade scenarios change in the future? (Will something "better" come?)
No, this is it. Teams will not become a Skype client and Skype will not become a Teams client.
Will there be upgrade from Skype for business on-prem to Skype for business Multi-Tenant?
No, nothing have been added/changed in the Skype for business Multi-Tenant version lately.
Is there a minimum on-prem server version of the hybrid to get Interoperability?
Yes, Lync 2013 (without Enterprise Voice) and Skype for business 2015 (with Enterprise Voice)
Will Skype for business Online meetings (recurring or not) be migrated to Teams?
No, only on-prem meetings will be migrated.
Is there a way to trigger the contact import manually?
Not right now but this could change in the future.
Is there an end-of-life date communicated for Skype for business Online?
What will happen to incoming PSTN calls in Islands mode?
Depends on how the connection to PSTN is made. With Calling plans the call would go to Skype for business, with direct routing it would go to Teams (most likely.)