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You can install Lync server 2013 standard edition on one VM and you need to install ADCS on AD. it will not effect on your exchange server because Exchange Server use public certificate. It's only effect if you will configure Voice mail by integrate Lync with UM or Configure Lync on OWA, in this case you will need to sip address to exchange certificate and use this certificate on Lync.<br />
For your information, To allow users using Lync from external, you will need another server for Lync Edge and Public Certificate for Lync.
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You can install Lync server 2013 standard edition on one VM and you need to install ADCS on AD. it will not effect on your exchange server because Exchange Server use public certificate. It's only effect if you will configure Voice mail by integrate Lync with UM or Configure Lync on OWA, in this case you will need to sip address to exchange certificate and use this certificate on Lync.
For your information, To allow users using Lync from external, you will need another server for Lync Edge and Public Certificate for Lync.

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<div class="content wysiwyg-content">
Hi,<br />
<br />
I want to setup Lync 2013.<br />
My current Environment is<br />
<br />
DC - Physical Server (AD/DNS/DHCP server)<br />
Hyper V - Physical Server running 3 VMs.<br />
<br />
I have set up another VM with 2012 R2 o/s where i would like to install Lync 2013.<br />
<br />
I have read that the AD server needs AD-CS. <br />
Can i install this without causing any issues to the current network?<br />
The exchange has it's own certificate installed on the network pc's.<br />
<br />
What issues will this cause? Will this interfere with my exchange?<br />
<br />
Thanks
</div>
</div>


Hi,

I want to setup Lync 2013.
My current Environment is

DC - Physical Server (AD/DNS/DHCP server)
Hyper V - Physical Server running 3 VMs.

I have set up another VM with 2012 R2 o/s where i would like to install Lync 2013.

I have read that the AD server needs AD-CS. 
Can i install this without causing any issues to the current network?
The exchange has it's own certificate installed on the network pc's.

What issues will this cause? Will this interfere with my exchange?

Thanks

Lync 2013 install on existing Network

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Chat / IM

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Microsoft Applications

Active Directory (AD) is a Microsoft brand for identity-related capabilities. In the on-premises world, Windows Server AD provides a set of identity capabilities and services, and is hugely popular (88% of Fortune 1000 and 95% of enterprises use AD). This topic includes all things Active Directory including DNS, Group Policy, DFS, troubleshooting, ADFS, and all other topics under the Microsoft AD and identity umbrella.