Notice: This website is an unofficial Microsoft Knowledge Base (hereinafter KB) archive and is intended to provide a reliable access to deleted content from Microsoft KB. All KB articles are owned by Microsoft Corporation. Read full disclaimer for more details.

Event 1000 occurs and the Rtcsrv.exe process crashes on a Skype for Business Server 2015 Front End server


View products that this article applies to.

Symptoms

When the Microsoft Skype for Business Server 2015 Front End (FE) server communicates together with a peer server through the Transmission Control Protocol (TCP) protocol, the FE service (Rtcsrv.exe) crashes. Additionally, the following event is logged in Application log:



The crash typically occurs every 24 hours after the FE server restarts.

↑ Back to the top


Cause

This issue occurs because the server applies incorrect logic to validate the address of the trusted TCP server.

↑ Back to the top


Resolution

To fix this issue, install the March 2016 cumulative update 6.0.9319.235 for Skype for Business Server 2015 Front End server and Edge server.

↑ Back to the top


More Information

Microsoft strongly recommends that you use Transport Layer Security (TLS) to help provide superior security through encryption and peer server authentication. Support for TCP connections to trusted applications is currently limited (for example, there is no support for IPv6), and the support may be deprecated in future releases of the product.

This issue can occur if the EnableTCP parameter is used together with the New-CsTrustedApplication cmdlet. This parameter tells Lync that the trusted application will use TCP. Use this parameter only if the trusted application is not a Microsoft Unified Communications Managed API (UCMA) application. This is because UCMA applications support only the mutual Transport Layer Security (MTLS) protocol. If you don't specify the Force parameter together with the EnableTCP parameter, you receive a confirmation prompt before the new trusted application is created.

↑ Back to the top


Keywords: kbfix, kbqfe, kbsurveynew, kbexpertiseinter, kb

↑ Back to the top

Article Info
Article ID : 3141114
Revision : 1
Created on : 1/7/2017
Published on : 3/18/2016
Exists online : False
Views : 250