more updates

Author: bobbytreed

articles/azure-arc/servers/overview.md

@@ -115,23 +115,33 @@ After you install the agent you see the following changes made to your servers.
 
 Services installed:
 
-* Himds - The **Azure Connected Machine Agent** service.
-* Dscservice - 
+* `Himds` - The **Azure Connected Machine Agent** service.
+* `Dscservice` or `gcd` - The **Guest Configuration** service.
 
 Files added to the server:
 
-* `%ProgramFiles%\AzureConnectedMachineAgent\*.*`
+* `%ProgramFiles%\AzureConnectedMachineAgent\*.*` - Location of **Azure Connected Machine Agent** files.
+* `%SystemDrive%:\Packages\Plugins\*.*` - **Azure Arc for Servers** extension packages location.
+* `%ProgramData%\GuestConfig\*.*` - **Guest Configuration** logs.
+
+Registry key locations:
+
+* `HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\Azure Connected Machine Agent` - Registry keys for **Azure Connected Machine Agent**.
+* `HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\Windows Azure\ScriptHandler` - Registry keys for Custom Script Extension.
 
 ### Linux
 
 Services installed:
 
-* Himdsd - The **Azure Connected Machine Agent** service.
-* dscd - 
+* `Himdsd` - The **Azure Connected Machine Agent** service.
+* `dscd` or `gcd` - The **Guest Configuration** service.
+* `extd` - The **Azure Arc for Servers** extension manager service.
 
 Files added to the server:
 
-* `/var/opt/azcmagent/**`
+* `/var/opt/azcmagent/**` - Location of **Azure Connected Machine Agent** files.
+* `/var/lib/extmgragent/**` - **Azure Arc for Servers** extension packages location.
+* `/var/lib/GuestConfig/**` - **Guest Configuration** logs.
 
 ## Supported Scenarios