Updating the Enterprise TWFX.exe.Config File

Last Modified on 06/25/2025 12:11 pm CDT

Overview

For Self-Hosted customers wishing to use Enterprise version 2025.6.26.*, released on June 27, 2025, or versions of Enterprise after 2025.6.26.*, changes will need to be made to the TWFX.exe.Config file. This Config file is located in the same directory as the TWFX.exe executable file which is used for launching Enterprise.

*Note* More information on deploying the Enterprise Client can be found within the article titled Enterprise Client Deployment Guide.


Updating the Config File

The following changes will need to be made to the TWFX.exe.Config file for Enterprise to run successfully. These changes are required to allow Enterprise to support sending email using modern authentication for Microsoft 365 and Exchange.

Find the following section in the Config file:

<runtime>
  <generatePublisherEvidence enabled="false"/>
</runtime>

Inside the <runtime> tag, under the <generatePublisherEvidence enabled="false"/> line, add the following lines:

      <assemblyBinding xmlns="urn:schemas-microsoft-com:asm.v1">
          <dependentAssembly>
              <assemblyIdentity name="System.Runtime.CompilerServices.Unsafe" publicKeyToken="b03f5f7f11d50a3a" culture="neutral" />
              <bindingRedirect oldVersion="0.0.0.0-6.0.3.0" newVersion="6.0.3.0" />
          </dependentAssembly>
          <dependentAssembly>
              <assemblyIdentity name="System.IdentityModel.Tokens.Jwt" publicKeyToken="31bf3856ad364e35" culture="neutral" />
              <bindingRedirect oldVersion="0.0.0.0-6.26.1.0" newVersion="6.26.1.0" />
          </dependentAssembly>
          <dependentAssembly>
              <assemblyIdentity name="Microsoft.IdentityModel.Tokens" publicKeyToken="31bf3856ad364e35" culture="neutral" />
              <bindingRedirect oldVersion="0.0.0.0-6.26.1.0" newVersion="6.26.1.0" />
          </dependentAssembly>
          <dependentAssembly>
              <assemblyIdentity name="Microsoft.IdentityModel.Abstractions" publicKeyToken="31bf3856ad364e35" culture="neutral" />
              <bindingRedirect oldVersion="0.0.0.0-6.26.1.0" newVersion="6.26.1.0" />
          </dependentAssembly>
          <dependentAssembly>
              <assemblyIdentity name="System.Memory" publicKeyToken="cc7b13ffcd2ddd51" culture="neutral" />
              <bindingRedirect oldVersion="0.0.0.0-4.0.5.0" newVersion="4.0.5.0" />
          </dependentAssembly>
          <dependentAssembly>
              <assemblyIdentity name="System.Text.Json" publicKeyToken="cc7b13ffcd2ddd51" culture="neutral" />
              <bindingRedirect oldVersion="0.0.0.0-7.0.0.1" newVersion="7.0.0.1" />
          </dependentAssembly>
          <dependentAssembly>
              <assemblyIdentity name="Microsoft.Bcl.AsyncInterfaces" publicKeyToken="cc7b13ffcd2ddd51" culture="neutral" />
              <bindingRedirect oldVersion="0.0.0.0-7.0.0.0" newVersion="7.0.0.0" />
          </dependentAssembly>
          <dependentAssembly>
              <assemblyIdentity name="System.Diagnostics.DiagnosticSource" publicKeyToken="cc7b13ffcd2ddd51" culture="neutral" />
              <bindingRedirect oldVersion="0.0.0.0-5.0.0.0" newVersion="5.0.0.0" />
          </dependentAssembly>
          <dependentAssembly>
              <assemblyIdentity name="System.Buffers" publicKeyToken="cc7b13ffcd2ddd51" culture="neutral" />
              <bindingRedirect oldVersion="0.0.0.0-4.0.5.0" newVersion="4.0.5.0" />
          </dependentAssembly>
          <dependentAssembly>
              <assemblyIdentity name="System.Numerics.Vectors" publicKeyToken="b03f5f7f11d50a3a" culture="neutral" />
              <bindingRedirect oldVersion="0.0.0.0-4.1.6.0" newVersion="4.1.6.0" />
          </dependentAssembly>
      </assemblyBinding>

The <runtime> section should now look like the following:

<runtime>
  <generatePublisherEvidence enabled="false"/>
  <assemblyBinding xmlns="urn:schemas-microsoft-com:asm.v1">
          <dependentAssembly>
              <assemblyIdentity name="System.Runtime.CompilerServices.Unsafe" publicKeyToken="b03f5f7f11d50a3a" culture="neutral" />
              <bindingRedirect oldVersion="0.0.0.0-6.0.3.0" newVersion="6.0.3.0" />
          </dependentAssembly>
          <dependentAssembly>
              <assemblyIdentity name="System.IdentityModel.Tokens.Jwt" publicKeyToken="31bf3856ad364e35" culture="neutral" />
              <bindingRedirect oldVersion="0.0.0.0-6.26.1.0" newVersion="6.26.1.0" />
          </dependentAssembly>
          <dependentAssembly>
              <assemblyIdentity name="Microsoft.IdentityModel.Tokens" publicKeyToken="31bf3856ad364e35" culture="neutral" />
              <bindingRedirect oldVersion="0.0.0.0-6.26.1.0" newVersion="6.26.1.0" />
          </dependentAssembly>
          <dependentAssembly>
              <assemblyIdentity name="Microsoft.IdentityModel.Abstractions" publicKeyToken="31bf3856ad364e35" culture="neutral" />
              <bindingRedirect oldVersion="0.0.0.0-6.26.1.0" newVersion="6.26.1.0" />
          </dependentAssembly>
          <dependentAssembly>
              <assemblyIdentity name="System.Memory" publicKeyToken="cc7b13ffcd2ddd51" culture="neutral" />
              <bindingRedirect oldVersion="0.0.0.0-4.0.5.0" newVersion="4.0.5.0" />
          </dependentAssembly>
          <dependentAssembly>
              <assemblyIdentity name="System.Text.Json" publicKeyToken="cc7b13ffcd2ddd51" culture="neutral" />
              <bindingRedirect oldVersion="0.0.0.0-7.0.0.1" newVersion="7.0.0.1" />
          </dependentAssembly>
          <dependentAssembly>
              <assemblyIdentity name="Microsoft.Bcl.AsyncInterfaces" publicKeyToken="cc7b13ffcd2ddd51" culture="neutral" />
              <bindingRedirect oldVersion="0.0.0.0-7.0.0.0" newVersion="7.0.0.0" />
          </dependentAssembly>
          <dependentAssembly>
              <assemblyIdentity name="System.Diagnostics.DiagnosticSource" publicKeyToken="cc7b13ffcd2ddd51" culture="neutral" />
              <bindingRedirect oldVersion="0.0.0.0-5.0.0.0" newVersion="5.0.0.0" />
          </dependentAssembly>
          <dependentAssembly>
              <assemblyIdentity name="System.Buffers" publicKeyToken="cc7b13ffcd2ddd51" culture="neutral" />
              <bindingRedirect oldVersion="0.0.0.0-4.0.5.0" newVersion="4.0.5.0" />
          </dependentAssembly>
          <dependentAssembly>
              <assemblyIdentity name="System.Numerics.Vectors" publicKeyToken="b03f5f7f11d50a3a" culture="neutral" />
              <bindingRedirect oldVersion="0.0.0.0-4.1.6.0" newVersion="4.1.6.0" />
          </dependentAssembly>
      </assemblyBinding>
  </runtime>

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About this Article
  • Created: 06/25/2025 12:05 pm CDT
  • Last updated: 06/25/2025 12:11 pm CDT
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