Issue Description

When logging into the K2 Mobile application, a K2 Pass-Through Authentication failed error appears numerous times in the HostServer.log file.

Error Message

The error message in the HostServer.log file will be similar to:

210352547","2017-08-22 10:59:48","Error","Communication","8130","ConnectionPacketError","SourceCode.SocketService.Legacy::HandlePacket","8130 Error processing message from 3012 K2 Pass-Through Authentication failed. Current Host Server configuration prevents switch to non-Windows identities.","","","BKK2APP01:C:\Program Files (x86)\K2 blackpearl\Host Server\Bin","210352547","500f602d650545419488724e4b548bc9",""


Enabling Anonymous Authentication and Windows Authentication at the same time caused problems with Integrated Authentication validation.


  1. Ensure you have K2 4.7 installed.
  2. Download and install the K2 4.7 August 2017 Cumulative Update from K2 Partner and Customer Portal.
  3. Get the K2 4.7 August 2017 Cumulative Update FP10 from Regional Support.
  4. Install the K2 4.7 August 2017 Cumulative Update FP10 to apply the fix.