Friday, August 1, 2014

Domain Join Error "Changing the Primary Domain DNS name of this computer tofailed error"

Hi All Readers,
I am working on a Active Directory migration project from Windows 2003 R2 Active Directory to 2008 R2 Active Directory fir multiple sites.
After I completed my migration project I was noticed that below error whenever I was trying to add a PC/laptop/Server to the domain, but it successfully adds to the domain.

But this error is very critical because when we add a duplicate name it won't give us the duplicate name errors simply it over-writes the existing host name which makes lot of issues.
I faced this critical error which makes over-writes the host names in the domain when you join.
For example: Already you had a host name called as PC.domain.com in the domain.com Domain.
When you try to add the another host name called as PC in the domain.com Domain, it doesn't give you the duplicate name error on the network it does over-write the existing host name called as PC.domain.com & it will add the new host name into the domain.

Host name which got over-written will get removed from the domain. I faced this issue in my project. My DPM host name got removed from the Domain & new host name got joined into the domain which halted my backups for one day.

Final Resolution is as follows:
You need to start the dns console on the DC & drop down the domain name.
Select the _msdcs when you click on _msdcs it will show the Name Server's list on the right hand side.
You need to add the Domain Naming Master under the _msdcs or add all the domain controllers which you had.

After you add the Name server's try joining the PC OR Laptop OR Server to the domain which is successfully joins it.
I hope this will resolve your issue.
Regards
Anand S

Sunday, June 22, 2014

Combined Exchange 2010 Hub Transport/CAS Role installation failed due to IP v6 is not enabled

Hello Readers

When I was installing combined Exchange 2010 HUB Transport and Client Access roles on Windows 2008 R2 SP1 got failed & given below error



Reason for Failed : IP v6 is not checked in the Lan connection.

Resolution : Simply check IP v6 in Lan connection and re-run the setup it should install successfully.



Regards
Anand S



Thursday, November 14, 2013

How to Uninstall Exchange Server 2010 mailbox Server Role

How to Uninstall Exchange Server 2010 mailbox Server Role


In my case I had DAG with 2 Mailbox Server Roles Installed

1) You can complete this step by going into the Organization Configuration - Mailbox - 
     Select Database Management Tab - Under Work Pane it will show the DBs which are added into the DAG. Right Click & select remove the Database & click remove - It will remove the Database membership from DAG
     
2) You can complete this step by going into the Organization Configuration - Mailbox - 
     Select Database Availability Groups Tab - Right Click properties of DAG name - 
     Click on Manage Membership Tab - Here you can remove the Member Servers which you want to        uninstall the mailbox servers. Select the Server & Click Delete. Process will get completed.
3) Now Delete the DAG name under DAG Group TAB. Here the DAG is deleted.
4) Now you go to Add or Remove Programs & select Microsft Exchange Server 2010. Click Uninstall.

It will show below window;

Uncheck the Server Role which you need to Uninstall & uncheck Management Tools as shown above.
Click Next it will check the Readiness Check.

Need to close MMC and EMC to prevent errors otherwise errors will show up for uninstall.

Here Exchange 2010 Mailbox Server Role is Uninstalled.



Thursday, November 7, 2013

Check out how many users or computers are authenticated in a given DC

Check out how many users or computers are authenticated in a given DC


Click Start, type powershell in the search box on the Start Menu, right-click the Windows PowerShell icon, and then click Run Windows PowerShell as administrator. If the User Account Control dialog box appears, confirm that the action it displays is what you want, and then click Continue



Run the script in the Windows PowerShell Console, You can type the command Get-Help