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5. Source: Wikimedia.org

6. Source: eat-drink-fly.com

7. Source: lhs204.stellpflug.com

8. Source: buzzfeed.com

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22. Source: Modality Systems

36. Decommission Lync 2010, Move to Lync 2013Move to 2010, Decommission R2 and Move to 2013 Client Strategy R2 clients can use 2013 server for IM/P Live Meeting console will NOT work against 2013 server Lync Client will need to be deployed at migration Live Meeting meetings will need to be rescheduled R2 users can attend Lync meetings via LWA R2 clients can use 2010 server for IM/P/Live Meeting meetings Live Meeting console client will work against 2010 Server Live Meeting meetings will need to be rescheduled Server Strategy Decommission Lync 2010 Build parallel 2013 server infrastructure Migrate OCS 2007 R2 users to 2013 Migrate R2 users to 2010 Decommission OCS 2007 R2 Migrate 2010 users to 2013 Advantages Single Server Migration Managed migration for Live Meeting meetings Disadvantages Multiple client migrations Requires decommission and rollback of all 2010 clients Two server migration Recommended Approach Recommended for customers who are not heavy users of conferencing features in OCS 2007 R2 today Recommended for customers who are heavy users of conferencing features in OCS 2007 R2 today

38. ClientLync Server 2013Lync Server 2010Office Communications Server 2007 R2 Lync 2013Supported Not Supported Lync Web App 2013SupportedNot Supported Lync 2010Supported Not Supported Lync 2010 AttendantSupported Not Supported Lync 2010 Group ChatInteroperable, manual config required SupportedNot Supported Lync Web App 2010Not SupportedSupportedNot Supported Lync 2010 AttendeeNot SupportedSupportedNot Supported Office Communicator 2007 R2Interoperable, only for IMSupported OCS 2007 R2 AttendantNot SupportedSupported Office Communicator 2007Not SupportedSupported Live Meeting 2007Not SupportedSupported

55. Lync Server 2010 with Mobility Service Lync Server 2013 (prior to CU1 update) Lync Server 2013, CU1 – Mobility Enabled Lync Server 2013, CU1 – Mobility Disabled Lync 2010 mobile clients Notification to upgrade to the latest version of the mobility client. Error: “Can’t sign in because you are not setup to use Lync 2013. Please contact your support team.”” Lync 2013 mobile clients Error: “You can't sign in with this version of Lync. Please install Lync 2010.” Error: “Can’t sign in because you are not setup to use Lync 2013. Please contact your support team.””

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