Lync, OCS, LCS

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Exchange server is used for below
1.      An email system (mails and messages)
2.      An calendaring system (scheduling)
3.      Address book system(contacts)
4.0 were first introduced by Microsoft in 1996 which was running on NT servers.
5.0 were introduced in 1997 which was running on NT 4.0 servers, OWA also introduced with this version.
Calendaring and address book also inbuilt feature in 5.0 versions.
5.5 introduced to remove bugs of all previous versions, basically 5.0 was testing ground for active directory.
2000 was launched in year 2000 and it was running on windows server 2000, gal was introduced in this version.
2003 was launched in 2003 it was a major breakthrough in messaging industry
1.      Better integration of AD and exchange
2.      Emails on mobile devices has been introduced
3.      Clustering i.e. Active/ Active and Passive/ Passive was introduced
4.      Service pack 1- CRC introduced
5.      Services pack 2- push messages on devices has started then there was no need to download messages
2007 was launched in year 2007
1.      Routing groups has been eliminated from this version, routing groups was basically used to replicate messages between exchange servers who are kept on different locations.
2.      AD site and services has started to replicate messages between exchange servers who are kept on different locations.
3.      OWA improved
4.      CR concept introduced (continuous Replication)
5.      CCR introduced
2010 was introduced in year 2010
1.      Simplified administration
2.      Exchange admin tool launched which can manage all exchange servers and users centrally
3.      Role based administration and user self-service web based management
4.      Power shell version 2 launched
5.      DAG introduced
6.      Integrated archiving and retention
7.      Client access requests went through CAS servers
8.      CAS works as frontend server.
9.      Hub and Edge transport server started creating shadow copies of all mail related data if servers went down then user related data will not be loosed.

2013      was introduced in year 2013

1.      Simplified administration we need to access https://casservername/ecp
2.      Hub & Unified Role has been removed
      Exchange Admin Center in Exchange 2013: The Exchange Admin Center (EAC) is the web-based management console in Microsoft Exchange Server 2013 that’s optimized for on-premises, online, and hybrid Exchange deployments. The EAC replaces the Exchange Management Console (EMC) and the Exchange Control Panel (ECP), which were the two interfaces used to manage Exchange Server 2010.

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