Microsoft Sql Server can operate in two Authentication Modes, the first is Windows Authentication, and the second is Mixed Mode. In Windows Authentication Mode only the users, which have Windows Accounts (either Active Directory or Computer Accounts) can login to Sql Server. In Mixed Mode we can create in Sql Server logins, which do not have corresponding Windows Accounts. Windows Authentication Mode is suggested by Microsoft as the best practice; however Sql Server DBAs often have to configure Mixed Mode, because there are numerous applications on the market, which requires it. Ability to quickly check authentication mode of Sql Server is crucial if we are performing an audit or we have to work on an instance, on which we do not know anything.

Power Shell is very handy when it comes to managing Exchange 2007. Adding new email addresses for existing mailbox users is very common task for exchange administrators. Unfortunately there is no one cmdlet which would allow it. Below I will present a simple script, which is a combination of Get-Mailbox and Set-Mailbox cmdlets.

Send As is very powerful permission in Exchange 2007. Send As permission allows a user to whom it was granted to send emails directly as another person. Implementing such feature is frequent requirement in many companies. For example an office assistant is responsible for replying to emails, which were sent to company mailbox. We could resolve it by granting Send on Behalf permission to office assistant, but what if we want to hide actual sender from recipients, in that situation Send As is the only choice.

When running Small Business Server 2008 Best Practices Analyzes, you can see that mysterious error.
DNS A resource record points to incorrect IP address

The host (A) resource record points to the incorrect IP address 192.168.1.59192.168.1.2. The record should point to 192.168.0.2.

.NET comes with many classes that make accomplishing almost any task quite easy. In below program I will present how easy is to retrieve a list of files in a directory using DirectoryInfo and FileInfo classes.