Why would MS Lync 2010 will not connect you without company VPN?

I work in the service desk and I was the user who could not connect to MS-Lync 2010 without a company VPN, user asked me why and I was not completely answering his question no matter who wants to answer this question in order to expand my knowledge?

Hello

Your question is beyond the scope of this community.

I suggest that you post your question in the Forums on Technet Lync.

https://social.technet.Microsoft.com/forums/Lync/en-us/home?category=Lync

See you soon.

Tags: Windows

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