Adobe Reader offline installer (.msi and .exe)

ftp://ftp.adobe.com/pub/adobe/reader -- .msi

ftp://ftp.adobe.com/pub/adobe/reader/win/10.x/10.1.0/ --navigate to parent to get the later versions

Updated 2013 Jan 14.
Tested working with IE9. Chrome may not work. Suggest use ftp client or command line to access.

Shadowing a RDP session

In short:
1. RDP to the server (it must be on the same server afaik) with the RDP session you want to shadow
2. Open command prompt
3. Type "shadow

Reference:
http://support.microsoft.com/kb/320191

Tracing source of IP conflict

Look for event id 4199, source Tcpip

HOWTO: Locating Global Catalog (GC) Servers in Windows Domain

nltest /dsgetdc: /GC

or

repadmin.exe /options * and use IS_GC for current domain options