Lync/SfB Client: Disable file upload to external conferences

In the March 2018 update for Lync2013/SfB2015 and SfB2016 a new setting was included that can disable file upload to external conferences (Federated and Anonymous). Before this update the Lync/SfB Client didn’t had a setting that could prevent file upload to external meetings: We can configure the EnableExternalFileTransferInConference setting with Inband Policy or Register Key: Inband Policy $a… Read more

“Cannot find the location of the Central Management Store in Active Directory” error on your Skype For Business Pool

Recently I faced an issue in which when trying to execute any command related to the CMS on an Enterprise Pool, I was getting the same error or a blank result: “Cannot find the location of the Central Management Store in Active Directory” The situation was worrying me because Skype For Business Server was not… Read more

Skype for Business Client with “Outlook Integration Error” for around 10/15 minutes

Scenario: Skype for Business client 2015/2016 (MSI or Click to Run) Skype for Business client April 2017 update (or higher) Exchange Server 2010 Problem: When opening the Skype for Business client you get in bottom right corner an exclamation mark, for around 10/15 minutes, with the following error: “Outlook Integration Error“. You open the “Configuration… Read more

Cannot remove the Director Pool – Users or Contacts are associated to it.

While trying to decommissioning a Lync Server 2013 Director Pool we got the following error message when we publish the new topology: This wasn’t expected since a Director Pool shouldn’t have users associated with it. After troubleshooting the issue, we notice that some users had the attribute msRTCSIP-PrimaryHomeServer associated to the Lync Server 2013 Director… Read more

Move users in Skype for Business Control Panel with MFA

Scenario: Skype for Business Server 2015 (CU6) Skype for Business Online, Windows PowerShell Module (Build: 6.0.9276.0) Skype for Business Pool configured in Hybrid Mode Skype for Business On-Premises administrator account has Multi-Factor Authentication(MFA) in Office 365 Problem: When you have this setup, in Skype for Business Server 2015 Control Panel, you try to move users… Read more

SfBMac: Cannot connect to EWS after enabling EWS Access Policy

In a recent support case the Skype for Business Mac client wasn’t connecting to Exchange Web Services (EWS) after the EWS Access Policy was configured with the following cmdlets: Set-CASMailbox -Identity brick@borderlands.lab -EwsApplicationAccessPolicy EnforceAllowList -EwsAllowOutlook $true -EwsAllowMacOutlook $true Set-CASMailbox -Identity brick@borderlands.lab -EwsAllowList @{add=’UCWA/*’, ‘OC/*’, ‘OWA/*’} Get-CASMailbox -Identity brick@borderlands.lab | fl Name,EwsApplicationAccessPolicy,EwsAllowOutlook,EwsAllowMacOutlook,EwsAllowList EWS was working except… Read more

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

Files from Office 365 groups aren’t visible in MS Teams (files are visible in actual Group)

If you have similar issue, you can follow the troubleshooting steps provided here to understand if the error is the same and then follow the resolution.   Files are visible on Groups of OWA But aren´t visible on Team Action Plan Step 1 – Collect Fiddler for troubleshooting 1. Download and install Fiddler From here:… Read more

How to reboot your Lync/SfB Servers without breaking the Quorum.

More than once the situation when I’m asked how we should really reboot a server in a pool minimizing the impact for the end users, and not breaking the Server Quorum, Fabric Service and Routing Groups currently in use. Before proceeding, it’s important to always take in consideration our Technet Article about High Availability. There, you… 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