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Can't connect to Lync Server from outside.

Posted on 2011-09-12
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Last Modified: 2012-05-12
Hi,

I've configured Lync server in my company. it works fine inside. Last week I've configured the Edge server Role but nobody can access it from outside. I didn't get any error during the installation/configuration.
I'm using a single FQDN and IP. I can ping and telnet the FQDN from outside but the connection fail.
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Question by:kitsao
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by:djjackfrwmml
ID: 36525841
Did you setup DNS SRV recordsf or your public DNS?
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Author Comment

by:kitsao
ID: 36527670
hi djjack,

I've created a record for my public IP in my internal DNS.
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Author Comment

by:kitsao
ID: 36550274
Hi,

I've tested the conection using testconnectivity.com and I get this error:

Subscription for provisioning data did not return a valid MRAS URI

that confirms that I didn't create a DNS SRV. I tried to create but had n success. Could you help?
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djjackfrwmml earned 500 total points
ID: 36550614
Right so the SRV records must go to your Public DNS.  This is usually the place you purchased the domain from.  For example  We have a domain.local (which is our internal netork domain) which our DNS is managed in AD and you can set all the appropriate records in there.  We also have domain.com (Which is our public domain) and DNS for that is managed by the company we bought the domain from.  We did all the DNS for internal connections through DNS in AD and for External access we called added the DNS to the public entity.

With that being said... sometimes SRV records can be a pain to add externally becuase some places don't allow them.  Lync has accomodated this by allowing multiple records to be allowed.  For example it will try sip_tls.domain.com and if it can't do that it tries another and then another.  
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Author Comment

by:kitsao
ID: 36552304
Hi djjack,

I created the SRV records and now I'm getting this error:

Register exception: Response Code 504, Deregister Reason None, Response Text Server time-out, Diagnostic Header
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Author Closing Comment

by:kitsao
ID: 36566407
Had the help of a Microsoft guy, he changed some security and authentication settings and recommended also the creation of a SRV record in my ISP DNS. Did and it works.
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Expert Comment

by:Americare
ID: 37168016
I'm having the exact same issue.  Can you please explain what he had you do.

I've created DNS records that point the public domain to my lync server, and i've created DNS records on my DNS server that internally point the domain at the lync server.

I must be missing something.

I'm able to connect externally, but A/V, Desktop Sharing, Whiteboard, all fail to connect.

Only IM works basically.

Thanks, for any help.
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