To allow send-on-behalf-of, you need to grant permissions on the “Inbox” to either “Author” or “Editor”
Mailbox limit issue.
Someone’s mailbox is full. Go into their Outlook via your PC by giving yourself permissions to their mailbox. But if their e-mails aren’t showing, turn off mailbox cache and try again.
Print spool issue
Printer appears in printers and faxes as offline but is working and running fine. Restart the print spool on the local machine should fix it or the server the printer is on.
Permission denied on PST/Archive file
Check permissions on the PST file. This issue was simply READ ONLY was
set on the file disallowing it to load despite permissions set.

DNS Lookup
Use
nslookup
at a command prompt
Marksman by Streets

Old skool arcade game. Took ages to find this pic so stuck here as there is only one other reference to it on the net I can find. Image robbed from here but not hot-linking the image.
http://arcadia-amusements.co.uk/retrogamehunt.html
There used to be one on Worthing pier but its long gone.
Default Gateway 0.0.0.0 issue in Server 2008 RC 2
http://srstrong.blogspot.com/2008/07/default-gateway-of-0000-in-vista.html
This is related to Vista but this fix worked on Server 2008 RC 2 where I was having the issue.
Default Gateway of 0.0.0.0 in Vista
Strange one just occurred – woke up my machine from sleep, and plugged in the various cables in no particular order. Everything looked good, except no network access. Could ping the local network (including the gateway), but nothing outside of that. Everyone else on the same subnet was seeing external IPs just fine.
A quick investigation with IPConfig showed that I had two default gateways, once with the correct address but another with an address of 0.0.0.0. And it was the one that was first in the list.
No idea where it came from – Vista does use that address if you are using dial-up networking, but I wasn’t (although my mobile was plugged in through USB to charge it, so perhaps it is related in someway). Anyhow – that was clearly the problem, so it was just a case of getting rid of the rogue gateway address.
Tried “ipconfig /renew”. Tried “ipconfig /release” then “ipconfig /renew”. Tried unplugging network cables, mobile phones etc. No luck. Reboot was looking likely. Last attempt was to use netsh. Success 🙂
For those of you who may get stuck in a similar situation, here’s the netsh rune that you need to cast:
netsh interface ipv4 delete address “Local Area Connection”
addr=a.b.c.d gateway=0.0.0.0where a.b.c.d is your local IP address. netsh can do just about anything to your local network config – well worth some exploration if you’re *really* bored.
OEM XP key
Requires an OEM copy of XP to work. All OEM keys are disabled and only phone activation works. This was cause people were nicking them.
How do I turn off Internet Explorer Enhanced Security Configuration in Windows Server 2008?
Unlike with previous versions of Windows Server–in which you could disable Internet Explorer Enhanced Security Configuration by removing the component in Add/Remove Programs, Windows Components–the Windows Server 2008 implementation of Internet Explorer Enhanced Security Configuration is configured through Server Manager.
Select the root of the Service Manager navigation pane, and under the Server Summary click Configure IE ESC, which is part of the Security Information section. A dialog box appears, letting Internet Explorer Enhanced Security Configuration be enabled/disable separately for normal users and administrators.
HTC Desire Test Mode
Go to the phone dialler and dial *#*#4636#*#* (DO NOT press send or call button) just wait a second and you will get the ‘test’ menu.