What is the difference with 1 Lync Standard Edition using VMware Fault Tolerant and 2 Lync Enterprise Edition in a cluster

Hi
As I will be planning to setup Lync on a virtual environment regardless if it is going to be the Standard or Enterprise edition.
I am thinking if we use 1 Lync Standard Edition for the FE Server with Fault Tolerance enabled, would it be as good as having 2 Lync Enterprise Edition in a cluster?
Thanks

Hi there,
the main difference between using Lync enterprise and lync standard is the High availability and scalability feature,
you will get fault tolrance setup with one lync standard edition running on whatever hyper-v and vmware platform, however this will not be an optimum highly available solution for the simple reason that upon a host server failure the image will move
to another available host server and users will lose their active session durin the move process.
on the other hand what you will gain if you the Enterprise edition is that you will have a unique identity to which all lync clients will be connecting and this identity is the lync pool identity which is in the background handled with multiple Front-End
servers and AV conferencing pools, mediation pools and so on.
In additioin when you have multiple front-ends in place, those front-ends will not work in active/passive mode as in a regular cluster, in contrairy all the servers will be active and handeling the work load.
hope i make it a bit clear, if yiu need more info i am ready
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Thanks for the response, being a small environment of 300 users, standard edition would be more than enough for me but the fact for HA is very critical for me at this stage. That is why I am exploring the option of using VMware FT.
I don't quick get what you mean on the users having to move to another image as my understanding of FT is in the event of a host failure (not VM failure like bluescreen etc), the VM will fail over to another host with no lost in any ping etc.
So, in theory, the Lync Server VM would never know that the parent ESX host had failed and it needed to failover to another host. Hope my understanding is correct.
Thanks

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