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
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
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
Setting up a second exchange server in the same routing group, all installed fine, however, after moving a mailbox to the new server and then sending an email to the mailbox, the mail got stuck in the queue on the first server. Checked the common things like DNS, firewall ports etc. all looked fine. But … Read more
You can find a duplicate email address, by using Active Directory Users and Computers, then following this procedure: To search for a duplicate address do the following: Open Active Directory Users and Computers. Right click on your domain name and click on the “find” option. Then choose “custom search”. Then click on the “Advanced” tab. … Read more
I came into work this morning to a downed Exchange storage group and mail store. In the event log just after the backup ran i saw these string of events in the event log on the Exchange server. <em>Event Type: Error Event Source: ESE Event Category: General Event ID: 482 Date: 27/10/2010 Time: 21:00:34 User: … Read more
The problem: You do not have permission to send on behalf of the specified user when trying to send via Outlook 2003. However all mailbox permissions are correct. Can’t send any messages, can recieve fine though, you may see an warning event log message on the exchange server each time the user tries to send. … Read more
Reset WSUS ClientBeen working on WSUS and have setup a WSUS server. However started to get a problem whereby the computers were appearing on WSUS and reporting their status then disappearing. I noticed that they were disappearing and being replaced by another computer. It turns out that when a machine is ghosted and then sysprep’ed … Read more
If you are virtualising its a good idea to disable the login screensaver, this will save on processor cycles wasted drawing the screensaver to save a screen that doesn’t exist. Imagine 10 servers on an ESX host all with the screensaver running this does create an overhead. To disable do the following: [Start] [Run] [Regedit] … Read more