Event ID 1046: File Transfer Agent cannot send replication data to Replica Replicator Agent on Edge

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Environment:

Skype for Business Server 2015 – On Premise

  • Front-End Server Standard Edition
  • Edge-Server Single

Issue:

In a recent deployment of Skype for Business server, we deployed our Skype for Business Standard Edition Front-End Server and have just finished deploying our Edge server  when the services started up we began seeing numerous errors in the event logs from Event ID 1046 : LS File Transfer Agent Service

“Skype for Business Server 2015, File Transfer Agent cannot send replication data to Replica Replicator Agent on Edge”replication-error

Resolution:

We knew this had to be a firewall issue, so here are the troubleshooting steps we performed:

  • We worked with the network/security team to review the firewall rules between the Front-End server and Edge Server and all the appropriate rules were in-place to allow the traffic from the Front-End server to the Edge on TCP 4443 amongst the other port required for communication.
  • We connected to the Edge Server and opened the Services console and validated that the Windows Firewall Service was started, which it was.
  • Next we review the Windows Firewall with Advanced Security and found that the firewalls for Domain, Public Private were all set to offeventid1046-fwoff
  • We then clicked on Inbound Rules to verify that the firewall rules for Skype for Business Edge were created, which they were
  • eventid1046-edgefwrules
  • So then we right clicked Windows Firewall with Advanced Security on Local Computer
    • Selected Properties
    • On the Domain, Private, Public profile Tabs we selected Firewall State On
    • Inbound and Outbound Connections (Default)

eventid1046-fwoneventid1046-fwon2

Once the firewall was turned back on the replication began to happen between the Front-End and Edge and the errors had subsided.

eventid1046-replicationworking

 

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