You have a Microsoft Lync Server 2013 deployment. Some users use Enterprise Voice. You plan to migrate to Microsoft Teams. You need to design a…

A direct hybrid migration from Lync Server 2013 to Microsoft Teams is not supported. To enable a managed, low-impact migration with coexistence capabilities, the on-premises environment must first be upgraded to a supported version of Skype for Business Server (2015 or 2019). Microsoft provides a direct, in-place upgrade path from Lync Server 2013 to Skype for Business Server 2015. This process is designed to minimize service disruption by upgrading the existing servers. Once the environment is running Skype for Business Server 2015, you can configure the required hybrid connectivity with Microsoft 365 and begin moving users, including those with Enterprise Voice, to Teams in a controlled manner.

A. Migrating directly from Lync Server 2013 to Teams is not a supported hybrid path. This would require a disruptive cut-over migration, failing the "minimize impact" requirement.

B. This option is inefficient and incomplete. It only addresses Enterprise Voice users and involves a more complex side-by-side migration to a new server version, which is not the most direct upgrade path.

C. This is incorrect for the same reason as option A; a direct hybrid migration from Lync Server 2013 is not supported. It also fails to address the Enterprise Voice users.

1. Microsoft Documentation

"Plan hybrid connectivity between Skype for Business Server and Microsoft 365 or Office 365": This document specifies the prerequisites for a hybrid deployment. Under the "Prerequisites" section

it states

"To configure a hybrid deployment

you need to have one of the following supported topologies: A Skype for Business Server 2019 deployment... A Skype for Business Server 2015 deployment..." Lync Server 2013 is not listed as a supported topology for direct hybrid configuration with Microsoft 365/Teams.

2. Microsoft Documentation

"Upgrade to Skype for Business Server 2015": This official guide details the upgrade process. In the "Supported upgrade paths to Skype for Business Server 2015" section

it confirms

"Skype for Business Server 2015 supports in-place upgrade from Lync Server 2013." This validates the first step in the correct answer.

3. Microsoft Documentation

"Move users between on-premises and cloud": This document outlines the process for migrating users in a hybrid environment. The entire process is predicated on having a supported hybrid configuration in place

which

as established

requires Skype for Business Server on-premises

not Lync Server 2013. The document states

"Moving a user from on-premises to TeamsOnly requires Skype for Business hybrid to be configured."