It is not possible to transfer data to the tax office with the old certificate after the ELSTER public certificate for COALA was changed. It is achieved by modifying the 'Microsoft.Dynamics.Nav.Client.exe.config' (usually under C:\Program Files (x86)\Microsoft Dynamics NAV\80\RoleTailored Client). The changes are listed as follows:
Add the following code to the configSections:
<sectionGroup name="applicationSettings" type="System.Configuration.ApplicationSettingsGroup, System, Version=4.0.0.0, Culture=neutral, PublicKeyToken=b77a5c561934e089">
<section name="Microsoft.Dynamics.ElsterTransferHandler.Properties.Settings" type="System.Configuration.ClientSettingsSection, System, Version=4.0.0.0, Culture=netural, PublicKyeToken=b77a5c561934e089" requirePermission="false"/>
</sectionGroup>
And add an applicationSettings under the configuration section as follows:
<applicationSettings>
<Microsoft.Dynamics.ElsterTransferHandler.Properties.Settings>
<setting name="PublicCertificateThumbprint" serializeAs="String">
<value>3d7d4c6abf46404bcf97b02a708bec2305614540</value> .
</setting>
</Microsoft.Dynamics.ElsterTransferHandler.Properties.Settings>
</applicationSettings>