SfB Server – Prerequisite installation failed: SqlInstanceRtcLocal

Recently while adding a new Front End Server to the existing Skype for Business Enterprise Pool we got the following message on SfB Deployment Wizard Step 1: Prerequisite installation failed: Prerequisite installation failed: SqlInstanceRtcLocal For more information, check your SQL Server log files. Log files are in the folder C:\Program Files\Microsoft SQL Server\MSSQL*.RtcLocal\MSSQL\Log, where the *… Read more

SfB Server 2015: Event 57005, LS User Store Sync Agent – Could not find stored procedure XdsQueryCriticalDocumentSignatures

While updating our SfB Server 2015 lab, we notice that a recently updated Front End server had multiple errors and warnings in the Event Viewer: Log Name: Lync Server Source: LS User Store Sync Agent Date: 12/09/2017 21:54:33 Event ID: 57005 Task Category: (1061) Level: Error Keywords: Classic User: N/A Computer: sfbfe03.recore.lab Description: Error encountered… Read more

Exchange Mailbox requirements for MS Teams and Troubleshooting

Exchange Mailbox Location The ideal state is for all Skype Teams users to have their mailboxes homed on Exchange Online. The minimum state for users to use Skype Teams are Exchange mailboxes on-premises with their identities synchronized to Office 365. For these Exchange hybrid customers, note that Meetings, Changing Profile Photo, and Connectors are not available… Read more

SfB Server: Cannot install KB2982006 – This update is not applicable to your computer.

In a previous post we explained how to install the KB2982006: Prerequisite (KB2982006) not satisfied when trying to install Skype for Business Server 2015 https://blogs.technet.microsoft.com/uclobby/2015/07/11/prerequisite-kb2982006-not-satisfied-when-trying-to-install-sfb-server-2015/ However, in a recent deployment with all the Windows Updates installed, including the KB2919442 and KB2919355,  we couldn’t install the KB2982006: We also got the same error in the Event… Read more

Lync/SfB Server: Event 41026, LS Data MCU after May 2017 .NET Framework update

Update 2017/06/28 – In Workaround #1 we also need to request new Front End certificates with Client and Server authentication in the EKU. Recently we notice that Lync Server 2010/2013 and Skype for Business Server 2015 Front Ends were generating the Events 41025 and immediately after the Event 41026: Log Name: Lync Server Source: LS… Read more

Lync/Skype4B Server: OAuthTokenIssuer, Assigned certificate not found or untrusted.

In a recent support case the OAuth certificate was missing in one of the Front Ends: We also notice the Missing message in the Deployment Wizard Step 3, for the OAuth certificate: And in PowerShell we had the following error when we tried to check the certificates: Get-CsCertificate https://technet.microsoft.com/en-us/library/gg398227.aspx Get-CsCertificate : OAuthTokenIssuer: Assigned certificate not found… Read more

SfB Server 2015: Cannot install Cumulative Update – Failed to create network share. (-2147467259 xds-replica)

In a recent support case we couldn’t install the Skype for Business Server 2015 Cumulative Update on a Edge Server: We checked the Skype for Business Core Components log file (OcsCore.msp-EDGESTD-[2017-03-21][15-30-48]_log.txt) located in %TEMP%: The log showed that the setup was aborted because it couldn’t create a file share: CreateSmb: Error 0x80004005: failed to create… Read more

Skype4B 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… Read more

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:… Read more

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… Read more