OCS 2007R2 client upgrade to Lync 2013 client

I have been assigned the task to upgrade the Communicator 2007 Clients to Lync 2013. We have office 2013 installed however the desktop folks deselected lync when setting up workstations and instead installed communicator 2007 R2.
 If I try to install Lync 2013 using msi file on the Office 2013 CD, msiexec gives returns an error that the product is missing required files. Searching the web all documents say that we cannot perform a installation of lync 2013 only and that the full office 2013 suite has to be installed. The setup file for office 2013 is setup.exe which cannot be installed with MSI, so I am at a loss on how to get this accomplished.

 My question:
  - Is there a way to install the lync 2013 client as a standalone product?
  - what options do I have to upgrade the client using Group Policy

 I have completed the upgrade of server from OCS 2007 R2 to Skype for Business Server 2015. The goal now is to have a silent upgrade of the clients without any user intervention.

 Thanks for your assistance.
Antonio02Asked:
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Ganesh Kumar ASr Infrastructure SpecialistCommented:
Here is the step by step article provided by microsoft for making silent install using GPO. http://social.technet.microsoft.com/wiki/contents/articles/9897.deploy-lync-client-using-group-policy.aspx

Lync 2013 basic client can be downloaded from the below location:
http://www.microsoft.com/en-us/download/details.aspx?id=35450
http://www.microsoft.com/en-us/download/details.aspx?id=35451

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Antonio02Author Commented:
Thanks Ganesh,

Sorry for the late reply but I was out of the office for the last few days. let me check these URLs and I will let you know the outcome.

Regards.
Antonio02Author Commented:
Hi Ganesh,

Thanks for your advice and I seem to be ahead of where I was before your assistance. There are a few issues that I see and hoping you can shed some light.
1) Previous version (Office Communicator 2007 I not uninstalled)
2) Every time the workstation is rebooted, setup in initiated.
3) Even though I use the /quiet and /passive switches, users are prompted for MS license and once the installation is completed.

Is there a way I could check if lync2013 is installed, to not run the setup & remove OCS 2007 once Lync 2013 is installed.

Thanks so much for your assistance.
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Ganesh Kumar ASr Infrastructure SpecialistCommented:
1 & 3 ) You can uninstall the previous version of OC 2007. If you have office 2007 in your environment then no issue the downloaded Lync basic client gets installed on the different location and though you will not be prompted for the license info.  If you have office 2013 installed then it may prompt. You need to bundle and install it.

2) That means you need to uninstall ms office before you deploy lync client.
suzbaraCommented:
So if you want to automate the detection of Lync and the removal of OC 2007 you need to have this done from a scripting language of your choice. Use the OCT (setup.exe /admin) for office to create your MST files that will automate your custom office install and you can deselect all the other products,  A simple bat file could do this as well using an If statement and file paths, you would then need to get your uninstall string for OC 2007 and add that to your batch file as well so that gets uninstalled silently. you could then deploy the batch script and source files for your custom office install via GP or preferably via sccm or deployment tool that can give you your saturation rate of the pushed package.
Antonio02Author Commented:
Thanks Guys
Reehan MohammedCommented:
i need a script for uninstalling ocs client 2007 r2 and installing lync client 2013 using GPO slient push without user interruption.
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