SfB Server 2015: SIP/2.0 503 Service Unavailable

While working on a PSTN integration with Skype for Business Server 2015, we notice that the inbound calls were being rejected immediately with SIP/2.0 503 Service Unavailable: TL_INFO(TF_PROTOCOL) [festd\festd]6984.23A4::03/06/2017-22:56:29.167.0000245B (S4,SipMessage.DataLoggingHelper:sipmessage.cs(801)) [4223311279] >>>>>>>>>>>>Outgoing SipMessage c=[<SipTcpConnection_1ACDDA8>], 172.20.20.40:5068->172.20.15.39:56945 SIP/2.0 503 Service Unavailable FROM: "Joule Adams"<sip:09920156101;phone-context=PrivateUnknown@recore.lab;user=phone>;tag=f0d14b5566;epid=8CE36BBBAB TO: <sip:+449920207101@172.20.20.40;user=phone>;tag=9837f16c5d;epid=14123C3787 CSEQ: 12538 INVITE CALL-ID: 49bfd2ea-8753-4651-a8aa-d7b48d066d93 VIA: SIP/2.0/TCP 172.20.15.39:56945;branch=z9hG4bKdab2e468 CONTENT-LENGTH: 0 SERVER: RTCC/6.0.0.0 … Continue reading SfB Server 2015: SIP/2.0 503 Service Unavailable

Lync Server: Event 41029 LS Data MCU – No connectivity with the Lync Web App

In a recent support case we were working on an issue where sometimes the users couldn't use the Lync Web App. The troubleshooting started in the Event Viewer > Lync Server, we notice that we had a few errors: Log Name: Lync Server Source: LS Data MCU Date: 01/03/2017 15:00:43 Event ID: 41029 Task Category: (1018) Level: … Continue reading Lync Server: Event 41029 LS Data MCU – No connectivity with the Lync Web App

Cannot Sign-in to Office 365 in SfB Control Panel – Exception of type ‘Microsoft.LiveID.IDCRL.IDCRLException’ was thrown

In a new Skype for Business Server 2015 lab we tried to sign-in to Office 365 in the Skype for Business Control Panel: But after a few seconds we got the following error message: We couldn't log in to your Office 365 account. Please check the errors and then select OK to try again: Get-CsWebTicket: Exception of … Continue reading Cannot Sign-in to Office 365 in SfB Control Panel – Exception of type ‘Microsoft.LiveID.IDCRL.IDCRLException’ was thrown

Missing Kerberos Account Assignments after SfB Server 2015 In-place Upgrade

Recently we were asked why in a multi site deployment the Kerberos Account Assignments disappeared on a global level, after a single site performed an In-Place Upgrade to Skype for Business Server 2015. When we look at the planning details for the In-Place Upgrade to Skype for Business Server 2015, it mentions that we need to have additional considerations … Continue reading Missing Kerberos Account Assignments after SfB Server 2015 In-place Upgrade

PSScript: Lync/SfB Server Certification Store Validation

In a previous post, we published the checks/validations that we should do in the Certification Store in the Lync/SfB servers. Checks to do in the Lync/SfB Certificate Store We decided to write a PowerShell with all these checks to make it simple to use. The script will be kept in sync with the post, meaning that … Continue reading PSScript: Lync/SfB Server Certification Store Validation

Lync Server 2013: Update ‘Windows Fabric Patch’ could not be installed. Error code 1603

In August 2014, an update to Windows Fabric was included in the Lync Server 2013 Cumulative Update. There's a list for the Windows Fabric updates: Lync/SfB: Windows Fabric version List During an update in our Lab, we got the following error message: Also, an error was logged in Event Viewer: Log Name:      Application Source:        MsiInstaller … Continue reading Lync Server 2013: Update ‘Windows Fabric Patch’ could not be installed. Error code 1603

Lync/SfB Server: Checking for duplicate entries in the Active Directory Configuration Partition

While troubleshooting the issue described in Checking for "ms-RTC-SIP-TrustedServer" multiple Active Directory entries with PowerShell, we encountered more duplicates for the same server, so we decided to compile all in one place. Like in our previous post Checks to do in the Lync/SfB Certificate Store, this list will also be updated and, again, you are … Continue reading Lync/SfB Server: Checking for duplicate entries in the Active Directory Configuration Partition

Checking for “ms-RTC-SIP-TrustedServer” multiple Active Directory entries with PowerShell

While publishing and enabling a topology, we were getting this error: Enable-CsTopology: Multiple Active Directory entries were found for type"ms-RTC-SIP-TrustedServer" with ID "<SERVER FQDN>". The publishing was successful but then the enabling was showing this error. The next step was to check the duplicates in the Active Directory Configuration Partition. For those who have already … Continue reading Checking for “ms-RTC-SIP-TrustedServer” multiple Active Directory entries with PowerShell

Lync Server 2013: Event 14497,14517 LS Protocol Stack

This issue dates a while back, but after Lync Server 2013 Cumulative Update 3 (5.0.8308.556 and above) the Edge Server Access Service won't start with the Event 14497 LS Protocol Stack: One or more configuration errors were detected at startup that cannot be mitigated. Cause: There are serious problems with the server configuration that prevented … Continue reading Lync Server 2013: Event 14497,14517 LS Protocol Stack

Lync/SfB Server: Event 31137,31138 LS Response Group Service

These are common warnings and usually associated with issues such as disabled AD account or user removed from Lync Server: Log Name: Lync Server Source: LS Response Group Service Date: 22/12/2014 19:32:15 Event ID: 31137 Task Category: (2001) Level: Warning Keywords: Classic User: N/A Computer: ************ Description: During the Active Directory update non-SIP enabled agents were … Continue reading Lync/SfB Server: Event 31137,31138 LS Response Group Service