update documentation

docs/troubleshooting.asciidoc

@@ -40,7 +40,7 @@ The easiest way to get debug information from the Agent, regardless of the way i
 
 Specifying at least one of the following environment variables will ensure the agent logs to a file
 
-`ELASTIC_OTEL_LOG_LEVEL` _(optional)_::
+`OTEL_LOG_LEVEL` _(optional)_::
 
 The log level at which the profiler should log. Valid values are
 
@@ -56,16 +56,16 @@ The default value is `warn`. More verbose log levels like `trace` and `debug` ca
 affect the runtime performance of profiler auto instrumentation, so are recommended
 _only_ for diagnostics purposes.
 
-`ELASTIC_OTEL_LOG_DIRECTORY` _(optional)_::
+NOTE: if `ELASTIC_OTEL_LOG_TARGETS` is not explicitly set to include `file` global file logging will only 
+be enabled when configured with `trace` or `debug`.
 
-The directory in which to write profiler log files. If unset, defaults to
+`OTEL_DOTNET_AUTO_LOG_DIRECTORY` _(optional)_::
+
+The directory in which to write log files. If unset, defaults to
 
 * `%PROGRAMDATA%\elastic\apm-agent-dotnet\logs` on Windows
 * `/var/log/elastic/apm-agent-dotnet` on Linux
 
-If the default directory cannot be written to for some reason, the profiler
-will try to write log files to a `logs` directory in the home directory specified
-by `ELASTIC_APM_PROFILER_HOME` environment variable.
 
 [IMPORTANT]
 --
@@ -82,8 +82,7 @@ A semi-colon separated list of targets for profiler logs. Valid values are
 * file
 * stdout
 
-The default value is `file`, which logs to the directory specified by
-`ELASTIC_APM_PROFILER_LOG_DIR` environment variable.
+The default value is `file` if `OTEL_DOTNET_AUTO_LOG_DIRECTORY` is set or `OTEL_LOG_LEVEL` is set to `trace` or `debug`.
 
 
 [float]