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Archive for February 6th, 2011

Exchange 2010 – Database Availability Group(DAG)

Posted by Awinish on February 6, 2011

Exchange 2010 offers HA using DAG(Database Availability Group). Configuring the DAG alone will not provide HA availability if its not supported by proper planning & design. The different DAG design have been discussed. Take a look at below link to know more. The network latency shouldn’t be more than 25 0ms. You can find more references in the below mentioned articles.

Database Availability Group Design Examples

Exchange 2010 High Availability Misconceptions Addressed

Exchange 2010 Notes from the Field – Multi-Site DAG Design

Understanding Database Availability Groups

Step by Step Create a Database Availability Group (DAG)



Posted in Exchange | Tagged: , | Leave a Comment »

Normal Domain Users Can Join default 10 machines to a domain

Posted by Awinish on February 6, 2011

By default, any domain users can add up to 10 machines to a domain, the reason is Every domain has a default setting for ms-DS-MachineAccountQuota value 10. You can modify this object in directory to prevent the domain user from joining the machine into domain by using ADSIedit tool to prevent this behavior.

WARNING Using Adsiedit incorrectly can cause serious problems that may require you to reinstall your operating system. Microsoft cannot guarantee that problems resulting from the incorrect use of Adsiedit can be solved. Use Adsiedit at your own risk.

  1. Install the Windows 2000/2003(2008/R2, adsiedit is pre-installed) Support tools if they have not already been installed. Run Setup.exe from the Support\Tools folder on the Windows 2000/2003 Server or Professional CD-ROM.
  2. Run Adsiedit.msc as an administrator of the domain. Expand the Domain NC node. This node contains an object that begins with “DC=” and reflects the correct domain name. Right-click this object and then click Properties.
  3. In the Select which properties to view box, click Both. In the Select a property to view box, click ms-DS-MachineAccountQuota.
  4. In the Edit Attribute box, type the number of workstations that you want users to be able to maintain concurrently.
  5. Click Set, and then click OK.

Once above steps are done, if user tried to add machine new machine into domain, he will encounter below error message.

Domain Error

Domain Error


Default limit to number of workstations a user can join to the domain


Default limit to number of workstations a user can join to the domain

Posted in Directory Services, OS/Certificates | Tagged: | 4 Comments »

Tweak..Enhance Internet Speed..Give a try.

Posted by Awinish on February 6, 2011

1.Go to Start –> Run and type regedit

2. Select hkey_current_user –> Software –> Microsoft –> Windows –> Current Version–> Internet Settings

3. Change the Decimal Value of “MaxConnections Per1_0Server” and “MaxConnections PerServer” (without the spaces) to 10

4. Close regedit and Reboot the machine

If these keys don’t already exist, create them, make two dword values

[Right click, New> dword Value]
MaxConnections Per1_0Server : Decimal value 10
MaxConnections PerServer : Decimal value 10
Internet Explorer performance is greatly dependent in part on the number of simultaneous connections that can be made for a current page. By default, the value is 4. This means only a maximum of 4 simultaneous connections will be made per server.

Posted in Misc | Leave a Comment »

CSVDE to fetch User data into csv

Posted by Awinish on February 6, 2011

Command to find the entire user in domain & redirecting the output in CSV.

csvde -f c:\User.csv -s dcname -t 389 -r (objectClass=user) -l co,department,distinguishedName,employeeID,facsimileTelephoneNumber,givenName,initials,l,mail,mobile,objectGUID,personalTitle,

Posted in Directory Services, Misc | Tagged: | Leave a Comment »