Issue with Presence and IM on Federation when having a side-by-side tenant and Skype for Business on premises deployment

Recently there have been quite a few reports by customers who have issues with Presence and IM while Federating with other organizations. One of the most common scenarios, related to this phenomenon, is tied up with tenants being part of the communication path between the two organizations. Usually, there is a tendency to ignore the… Read more

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 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

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

The user Accounts in Outlook and SfB do not match error when scheduling a Skype For Business Meeting from Outlook.

Even if there is many information about this error, recently I’ve faced a very interesting situation in an Exchange Hybrid + Skype For Business Environment in which the users were configured with a different Mail Address (SMTP), Skype Address (SIP) and User Principal Name (UPN). The issue: When trying to schedule a meeting on Outlook,… Read more

SfB Server 2015: Pool Pairing with CMS and AlwaysON

We already publish guides to Deploying SQL Server AlwaysOn Availability Group for Skype for Business Server 2015 and also SfB Server 2015: Moving Central Management to a pool with SQL Server AlwaysOn BackEnd. However, we were asked to create another guide when we want to pair two SfB Enterprise Pools where the Primary Pool is hosting the Central Management Store… 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