When you made it through the KBs (2/2), it means that the Exchange Connector (EC) is setup and working correctly.
If the default signature is not applied (and you remembered to create Plain Text version), the time has come to troubleshoot your Exchange Gateway (EG).
You enable logging and check if the log contains any errors after sending some emails. Logging is disabled by default.
When you submit a support ticket, we need the log in order to be able to assist.
How to enable logging
To do so, you will need to add a system.diagnostics section to EdgeTransport.exe.config (use search, it is in your exchange server's bin directory).
Make sure to save existing config before editing!!!
Add the following, to EdgeTransport.exe.config:
<system.diagnostics> <sources> <source name="EMSTransportAgent" switchName="SourceSwitch" switchType="System.Diagnostics.SourceSwitch"> <listeners> <remove name="Default"/> <add name="tempFile" type="System.Diagnostics.TextWriterTraceListener" initializeData="C:\TEMP\EMSTransportAgent.log" traceOutputOptions="ProcessId, DateTime"/> </listeners> </source> </sources> <switches> <add name="SourceSwitch" value="Verbose"></add> </switches> <trace autoflush="true" indentsize="4"/> </system.diagnostics>
Now replace "C:\TEMP\EMSTransportAgent.log" with your valid path.
This path must be accessible, by the NETWORK SERVICE system account, with WRITE Permissions.
The system.diagnostics section must be inside of the <configuration> section.
Add it to the end of the file, right before final <configuration> tag.
Now, restart the edgetransport service (named "Microsoft Exchange Transport" in the Windows Services management console) and you will now have logging.
Perform the tasks that Support suggested and then remove the log again, as soon as possible.