Modify your external DNS zone to point to Skype for Business Online using the following table as reference Plan for some disruption – There may be some outage where clients sign out and back in, so be mindful this may happen and inform your users, managers and team of what to expect. Ensure that your business does not rely on any on premises feature of Skype for Business / Lync and you are ready to start the decommissioning process. If you have users still on premises then move them across using the following PowerShell Move-CsUser –Identity -Target -Credential -HostedMigrationOverrideUrl First we must ensure that all users have been moved from on premises Skype for Business / Lync to Skype for Business Online. Once we understand the logic of how the system handles requests in hybrid we can begin to plan our move to cloud only delivery. Sign in workflow of Office 365 user from Internal Sign in workflow of Office 365 user from External This allows the user’s client to sign in directly to the online tenant using Microsoft Office 365 URLs. The on premises front end server is clever enough to realise that the user’s SIP identity and service lives (courtesy of AD) in Office 365 and will issue a redirect to the cloud service from the discovery phase.
Therefore, sign-in requests will come to the on premises front end servers using lyncdiscover and SRV records. With any Hybrid configuration, the on premises deployment is the source of authority for that service. The sharing of the namespace allows administrators to move users between the two deployments with their data and redirect sign-in requests to the correct deployment. Unlike Microsoft Exchange Hybrid where the integration is more heavily woven together, Skype for Business Hybrid is actually nothing more than 2 independent federated domains with the additional configuration that they share a common namespace. So what to do once we no longer need hybrid – just turn off on premises servers? No. For these businesses, they simply want to use hybrid to move users from on premises to the cloud and that’s it. There are still businesses out there who made a heavy investment in on premises infrastructure for Instant Messaging and Presence services only who are now looking at Skype for Business Online as a cheaper alternative due to its OPEX pricing model. We have become so focused on what benefits hybrid gives us now and in the future with Skype Broadcast Meetings, Cloud PBX etc that perhaps we have forgotten not everyone needs it. However, there appears to be little information about what to do when Hybrid is no longer required.
There is a lot of documentation out on the internet on the benefits of Skype for Business and Skype for Business Hybrid, how to configure, how to move users etc.
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