{"id":373,"date":"2014-11-22T10:02:12","date_gmt":"2014-11-22T08:02:12","guid":{"rendered":"http:\/\/www.vatland.no\/?p=373"},"modified":"2014-11-22T10:02:12","modified_gmt":"2014-11-22T08:02:12","slug":"lync-dhcp-options-and-windows-2012-r2","status":"publish","type":"post","link":"https:\/\/www.vatland.no\/index.php\/lync-dhcp-options-and-windows-2012-r2\/","title":{"rendered":"Lync DHCP options and Windows 2012 R2"},"content":{"rendered":"

\"Lync2013\"<\/a>Recently had a issue where Lync phones (Polycom CX600) using number and pin\u00a0where unable to download the\u00a0CA\u00a0certificate chain. Tethered phones worked fine.\u00a0Some network packet inspection\u00a0revealed that the DHCP server did not provide any of the options 43 information. The client (phone) asked for the correct vendor class “MS-UC-Client”, but there was no response from DHCP server. To add these options to the DHCP server we used the same script as we always use, so it was sure there was nothing wrong with the server. Asked the crew running the network equipment to check but they\u00a0did not notice anything being blocked.\u00a0<\/p>\n

Went to the server and checked out server options :<\/p>\n

\"dhcpserveroptions\"<\/a><\/p>\n

This fooled me for a while. I did’nt notice this showd me the value of option 001 – “UCIdentifier”. Some more hair pulling. Finally looked at Vendor Classes for IP4.\"DHCPWrongClass\"<\/a><\/p>\n

Getting used to these hex values I did’nt notice anything wrong, but to be sure I\u00a0went to another server\u00a0(Windows 2008R2) to compare.<\/p>\n

\"dhcpvendorclassedit\"<\/a><\/p>\n

Dooh!.. So now I changed the value of my problem server. A reboot of the Lync phone – login success. I Wonder if this a bug in our script or in Windows 2012R2. But any issues on standalone Lync phone\u00a0– check your DHCP .<\/p>\n","protected":false},"excerpt":{"rendered":"

Recently had a issue where Lync phones (Polycom CX600) using number and pin\u00a0where unable to download the\u00a0CA\u00a0certificate chain. Tethered phones worked fine.\u00a0Some network packet inspection\u00a0revealed that the DHCP server did not provide any of the options 43 information. The client (phone) asked for the correct vendor class “MS-UC-Client”, but there was no response from DHCP … Continue reading Lync DHCP options and Windows 2012 R2<\/span> →<\/span><\/a><\/p>\n","protected":false},"author":1,"featured_media":0,"comment_status":"open","ping_status":"closed","sticky":false,"template":"","format":"standard","meta":{"jetpack_post_was_ever_published":false,"_jetpack_newsletter_access":"","_jetpack_dont_email_post_to_subs":false,"_jetpack_newsletter_tier_id":0,"_jetpack_memberships_contains_paywalled_content":false,"_jetpack_memberships_contains_paid_content":false,"footnotes":"","jetpack_publicize_message":"#Lync #DHCP options and #Windows 2012 R2","jetpack_publicize_feature_enabled":true,"jetpack_social_post_already_shared":true,"jetpack_social_options":{"image_generator_settings":{"template":"highway","default_image_id":0,"font":"","enabled":false},"version":2}},"categories":[6,10],"tags":[],"class_list":["post-373","post","type-post","status-publish","format-standard","hentry","category-lync","category-windows"],"aioseo_notices":[],"jetpack_publicize_connections":[],"jetpack_featured_media_url":"","jetpack_sharing_enabled":true,"jetpack_likes_enabled":false,"jetpack-related-posts":[{"id":57,"url":"https:\/\/www.vatland.no\/index.php\/lync-phone-unable-to-sign-in-after-windows-update-on-lync-server\/","url_meta":{"origin":373,"position":0},"title":"Lync phone unable to sign in after windows update on Lync Server.","author":"Atle","date":"January 2, 2013","format":false,"excerpt":"After update to Root Sertificates ( KB931125) http:\/\/support.microsoft.com\/kb\/931125\u00a0You are constantly getting Warning in the eventlog. Also Lync Phones will be unable to sign in. The error message on the phone is that the \"Registrar FQDN could not be resolved\". UPDATED: On new Phones you will only get a message that\u2026","rel":"","context":"In "Lync"","block_context":{"text":"Lync","link":"https:\/\/www.vatland.no\/index.php\/category\/lync\/"},"img":{"alt_text":"","src":"","width":0,"height":0},"classes":[]},{"id":13,"url":"https:\/\/www.vatland.no\/index.php\/lync-client-will-not-show-contact-photos-when-external\/","url_meta":{"origin":373,"position":1},"title":"Lync client will not show contact photos when external.","author":"Atle","date":"March 13, 2014","format":false,"excerpt":"Installed Lync 2013 on a Windows 2012R2 server. When I login with an external Lync\u00a0Client there are no photos of internal users. A\u00a0validation shows that the thumbnailPhoto attribute has bin populated with images\u00a0of the correct size.If the\u00a0client Connect directly to the frontend server\u00a0photos are presented correctly.An examination of the Lync\u00a0Addressbook\u2026","rel":"","context":"In "Lync"","block_context":{"text":"Lync","link":"https:\/\/www.vatland.no\/index.php\/category\/lync\/"},"img":{"alt_text":"","src":"","width":0,"height":0},"classes":[]},{"id":19,"url":"https:\/\/www.vatland.no\/index.php\/how-to-test-network-routing-from-remote-lync-client\/","url_meta":{"origin":373,"position":2},"title":"How to test network routing from remote Lync client.","author":"Atle","date":"January 28, 2014","format":false,"excerpt":"Often we have to troubleshoot routing and firewall rules as seen from a\u00a0client on a internal client subnets. I use PSEXEC and\u00a0PORTQRY from Microsoft. This will work if it is a Windows pc and I have permissions to connect to it. Run these commands from a server in the server\u2026","rel":"","context":"In "Lync"","block_context":{"text":"Lync","link":"https:\/\/www.vatland.no\/index.php\/category\/lync\/"},"img":{"alt_text":"","src":"","width":0,"height":0},"classes":[]},{"id":65,"url":"https:\/\/www.vatland.no\/index.php\/lync-server-2013-prerequisite-install\/","url_meta":{"origin":373,"position":3},"title":"Lync server 2013 prerequisite install.","author":"Atle","date":"August 2, 2012","format":false,"excerpt":"When installing Lync server 2013 on a Windows server 2012 I got a missing prerequisite. All you have to do is to install the \"Windows Identity Foundation\" feature. Powershell: Add-WindowsFeature Windows-Identity-Foundation To\u00a0install all\u00a0of required Windows features : import-module servermanager add-windowsfeature telnet-client,RSAT-ADDS,net-framework-45-core,windows-identity-foundation,Web-Static-Content,Web-Default-Doc,Web-Http-Errors,web-asp-net,web-asp-net45,Web-Net-Ext,Web-ISAPI-Ext,web-isapi-filter,Web-Http-Logging,Web-Log-Libraries,Web-Http-Tracing,Web-Windows-Auth,Web-Filtering,Web-Stat-Compression,Web-Dyn-Compression,Web-Mgmt-Console,Web-Scripting-Tools,Web-Client-Auth,server-media-foundation,MSMQ-Server,MSMQ-Directory,NET-WCF-HTTP-Activation45 \u00a0To add \"add-windowsfeature Web-Asp-Net,Web-Net-Ext \" your computer needs access\u2026","rel":"","context":"In "Lync"","block_context":{"text":"Lync","link":"https:\/\/www.vatland.no\/index.php\/category\/lync\/"},"img":{"alt_text":"","src":"","width":0,"height":0},"classes":[]},{"id":28,"url":"https:\/\/www.vatland.no\/index.php\/lync-client-will-not-get-past-contacting-server\/","url_meta":{"origin":373,"position":4},"title":"Lync client will not get past “Contacting server….”","author":"Atle","date":"January 6, 2014","format":false,"excerpt":"When you start the Lync Client and won't get past \"Contacting server..\" ,and it never time's out.\u00a0It can be worth checking time on\u00a0client and servers.\u00a0Other users can sign in to Lync, even on the same PC. 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