The ramblings of a computer geek
We were moving our mailbox from our old Exchange 2003 server to a new Exchange 2010 server, we moved the vast majority of people no problems, however there were about 10 or so users who we had this error with. Problem: “Property expression <blah> isn’t valid. Valid values are: …..” Now the user’s mailbox on … Read more
I was viewing a CHM file from a UNC path, and was getting a “page cannot be displayed error”, this appears to be down to the CHM file being read by Internet explorer, as it thinks this is a remote site it applies the internet zone restrictions. To workaround this I copied the CHM file … Read more
A odd problem with Active Directory that I came across this week; a user object keep on “losing” its permissions. When adding the “Send As” permissions for Exchange on a AD user object all seemed to go okay, then about 20 minutes or so later the permission would just vanish! After much rumaging around I … Read more
Tried to connect up to a pix using a Cisco VPN Client, the connection connected fine, but when I tried to VNC or RDC to something had no joy. Checking the statistics of the vpn connection on my pc it showed sending traffic but not getting anything back. This is caused by a problem with … Read more
Was getting the problem that mails were being delayed from Exchange when sending outbound via a Postfix SMTP relay. After much work to try to determine the issue, I discovered that the Postfix server was responding with 400 errors for domains that did not exist or for domains that didn’t even have MX records. I … Read more
Explainations of the Windows 4GB Limit, PAE, AWE and Large Page Support
The increasing use of the Internet is driving the use of ADSL among businesses and homes, more and more people are getting hooked up and using ADSL and the Internet in new and exciting ways, running more services and using their internet connection to links networks through VPN and running their own web servers. Getting … Read more
At least once a year in the UK on a Bank Holiday the film WarGames is shown, possibly the best film about computer hackers ever made, as the inspiration for films such as Hackers, Swordfish, Sneakers, The Net and others. The computers and technology in it may be dated but its still an excellent sci-fi … Read more
Visual Basic is a more complex and updated version of an old programming language known as BASIC. BASIC stands for Beginners All Purpose Symbolic Instruction Code. BASIC became popular as a simple high-level programming language due to its simplicity and its ease to learn, that why most people now probably learnt to program with BASIC. … Read more
Email is a tricky thing to do right, though a couple of simple tools can help you test your mail server before you start to use it, i.e. make sure mail can be delivered correctly to a users mailbox. Also it can help diagnosing certain problems that you might have with your email. POP – … Read more