Monday, 5 October 2015

Unable to Access VMware vSphere Client Using Domain ID

In normal implementation, it is always a best practice to provide permission per group, rather than per individual ID. Simple reason is, it is easy to administer and manage. Therefore, it was what I did in one of my vCenter implementation, but I could not make it work. It just did not allow me to login using my Domain ID (which configured as part of Local Administrators members in vCenter server), although local ID (part of Local Administrators members as well) worked as expected.

Issues :
Error while connecting to vCenter Server using VMware vSphere Client. Error is :

Error Connecting
The vSphere Client could not connect to 
"vCenter Server Name"
You do not have permission to login to the server :
"vCenter Server Name"

  1.  Assigned appropriate domain ID (MyDomain\DomainAdminID) to a Domain Group (MyDomain\Domain Admins)
  2.  Assigned that Domain Group to Local Administrators in vCenter server
  3. (Double kill!) Assigned that Domain ID (MyDomain\DomainAdminID) to Local Administrators in vCenter server.

  4. Configured Local Administrators with Full Admin Role in vCenter Permissions. Note that above Domain ID was not configured here. Local ID (.\ctxadmin) that will be used to test also not be configured here.

  5. Tried to access vCenter using that domain ID, error prompted

  6. Tried to access vCenter using local ID, successful

  7.  Session with local ID.

Resolution :
It seems that starting from vSphere 5.5, configuring domain IDs/groups to local groups will cause the issue. Based on VMware KB  : 

 This is an expected behavior.
To resolve this issue, give explicit permissions to Users or Groups from their respective Identity Sources. For example:
  • Only populate Local OS groups with Local OS users or groups
  • Only populate Active Directory groups with Active Directory users or groups

In order to do so :
  1.  Add User ID / group to vCenter. Choose the domain, search the ID / group, and add them accordingly.

  2.  Able to access, no error

  3.  Session active with AD user ID.



Friday, 25 September 2015

vCenter 5.5 - Unable to Grant Permission to Domain ID - No Domain Listed

One fine day, someone came to me and asked, " I can't add domain users to vCenter. Can you help?" So, when I checked, I found this :

So yes, no domain listed there. So when I asked in detail, it seems this was a new deployment, vCenter just being created. Which really helped me to narrow down to root cause.

Issues :

Unable to Grant Permission to Domain ID - No Domain Listed 

  1. Login to vCenter using default admin ID ( administrator@vSphere.local ). These steps shall be done from Web Console rather than vSphere Client.

  2.  Click at Administration

  3. Click at Single Sign-On > Configuration. So as we can see here, only vSphere.local and vCenterServer (Default) are configured in Identity Sources. It means, these are the only domains which can be authenticated to.

Resolution :
  1.  Click at Add Identity Source.

  2.  Depending on the environment, appropriately choose identity source type. For this example, it is Active Directory  (Integrated Windows Authentication).Key in the Domain Name and all required info.

  3.  Once done, you will see the new source listed here.

  4. Newly added domain will be listed here.

Friday, 18 September 2015

The Trust Relationship Between This Workstation and The Primary Domain Failed

This is one of the common issue happen to PVS environment, IF the environment is not properly configured. The trust relationship will failed, if the password expiration days is  set below than computer account password updates. For example, if you set the password to be expired in 5 days, and computer account password updates set for 7 days, the password will then expired 2 days before renewal. Therefore, either disable password expiration, or properly set these 2 options according to Corporate Security policy.

Issues :

PVS : The Trust Relationship Between This Workstation and The Primary Domain Failed

  1.  Accessed to the VDA, could not authenticate using domain ID. 
  2. Convert the VDA to Private mode / Create new version under Maintenance mode, unjoined and rejoined to domain. Put the VDA to Standard Mode / promote to Production, issue persisted.

Resolution :
  1.  Shut down the target device.

  2.  Right click at it, go to Active Directory > and choose Reset Machine Account Password...

  3.  Correctly choose Domain as well as the Organization Unit, and press Reset Account

  4. Resetting target device

  5.  Target Device successfully reset

  6.  Bring up the target device and try again.

Friday, 11 September 2015

How To : StoreFront Factory Reset / Rejoin Citrix StoreFront to Server Group

In some situations, you may need to unjoin a StoreFront server from an existing server group, and join the server to a different server group. However, after you remove it, there is no option to add it back. You will see this screen at your StoreFront server.

So, what it The easiest way? Reinstall StoreFront!

However, there is another cool way to do this, especially if you want to show off in front of your customers (no, I have never done this), or if you want to flaunt your expertise in front of your juniors (never done this as well).

Description :
StoreFront Factory Reset / Rejoin Citrix StoreFront to Server Group

How To Do :

  1.  Close all opened / active Storefront consoles. You will get error if there is active session. Launch PowerShell as Administrator.

  2.  Type asnp Citrix*

  3.  Browse to %Program Files%\Citrix\Receiver StoreFront\Scripts

  4.  Run ImportModules.ps1

  5.   Modules imported

  6. Run this command : Clear-DSConfiguration

  7. Command completed.

  8.  Close PowerShell, and launch StoreFront. You will get the option to join to existing server group back.

Reference :



    Friday, 4 September 2015

    Disabling drive mapping on Server 2008

    In previous post, I mentioned on how to disable drive mapping on Server 2003 via GPO. In this post, I will show on how to disable drive mapping on server 2008.

    Description :
    Disabling drive mapping on Server 2008

    How To Do :
    1.  Access to GPMC, edit the intended GPO. Browse to Computer Configuration > Policies > Administrative Templates > Windows Components > Remote Desktop Services > Remote Desktop Session Host > Device and Resource Redirection
    2. Click at ' Do not allow drive redirection '. That is our target setting
    3. Right click at it, and press Edit
    4.  Choose Enabled, press Apply and OK.
    5.  You can double confirm the setting by checking at ICA-TCP and RDP-TCP Properties. They are now checked, and grayed out.

    6. And this is the explanation by Microsoft on the GPO setting.


      Friday, 28 August 2015

      Unable to Join Computer To Domain : The domain controller does not meet the version requirement for this operation

      Few weeks ago, I had to un-join and rejoin one of my VM to our domain. Unjoin from the domain, checked. Rejoin to the domain, failed?? I know some of you may feel like "heh? is it that hard?" So no, it is not hard at all, but this was my first time I got below error (no screenshot, I forgot to capture one!)

      Issues :

      ERROR : The domain controller does not meet the version requirement for this operation.

      But before the error prompted, I needed to key in my Domain Admin credential, which (1) I am pretty sure it was correct, and (2) it means my VM was connected to the network, and able to talk to Domain Controller.

      Troubleshooting :

       I tried to join to domain using command line as below :

      Friday, 21 August 2015

      How To Change NetBIOS Name of A Computer

      So yes... After 4 months without new contents, so I started with this. It looks easier to do (well, it is), but before you do that, you may want to read this to understand the difference between hostname and netBIOS, then starts to explore on when to use them, their limitations etc etc. I won't discuss here (or maybe not today). So let's back to the topic.

       Description :
      Changing NetBIOS Name of A Computer.

      ComputerName :

      NetBIOS :

      How To Do :

      1.  Go to Start > Run, and type REGEDIT
      2.  Browse to Computer > HKEY_LOCAL_MACHINE > SYSTEM > CurrentControlSet > Control > ComputerName > ComputerName

      3. At the right side, double click at ComputerName string, and put correct Value data. Press OK.
      4.  Then you will get this
      5. Reboot your computer / VM.
      6. Once it is up, double check your netBIOS name. New name shall be reflected

      Friday, 1 May 2015

      Disable Local Drive Mapping On Windows Server 2003

      This post will show on how to disable local drive mapping via GPO for Windows Server 2003 environment. Considering GPO will take precedence over Citrix policy, this setting will work on both RDP and ICA sessions.

      Description :
      Disable local drive mapping via GPO (the same setting can be applied to local policy too)

      How To Do :

      1. Open your Group Policy Object, and browse to this setting ( Computer Configuration > Administrative Templates > Windows Components > Terminal Services > Client/Server data redirection 

      2.  Let's focus on Do not allow drive redirection. Right click at it, and click at Properties

      3.  Choose Enabled, press Apply and OK.

      4.  This will be the outcome.

      5. This is the explanation on this setting by Microsoft.  

      6. Drive mapping is now disabled, and users are not able to change it.