Windows 10: New server wit previous domain name

bburks85 · Feb 19, 2020

We recently had to replace a Windows Server 2011 with Windows Server 2019. This was done by building a new server rather than doing an upgrade. When building the new server, it was given the same computer name and domain as the previous server. We removed workstations from the domain and then added them back in top the domain. Now the network drives that are connected on the workstations using Group Policies don't always appear. Running gpupdate / force gives the error:

Computer policy could not be updated successfully. The following errors were encountered:

The processing of Group Policy failed. Windows could not resolve the computer name. This could be caused by one of more of the following:
a Name Resolution failure on the current domain controller.
b Active Directory Replication Latency an account created on another domain controller has not replicated to the current domain controller.
User Policy could not be updated successfully. The following errors were encountered:

The processing of Group Policy failed. Windows could not resolve the user name. This could be caused by one of more of the following:
a Name Resolution failure on the current domain controller.
b Active Directory Replication Latency an account created on another domain controller has not replicated to the current domain controller.

To diagnose the failure, review the event log or run GPRESULT /H GPReport.html from the command line to access information about Group Policy results.

What can we do to get these systems to communicate properly with the new domain controller?

:)

Brink · Feb 19, 2020

New File Share Witness Feature in Windows Server 2019

This blog discusses a new feature in the upcoming release of Windows Server 2019. Currently, Windows Insiders receive current builds of Server 2019. We urge you to become an Insider and play a part in making Windows Server 2019 the best that it can be. To do so, go to this link and sign up.

One of the quorum models for Failover Clustering is the ability to use a file share as a witness resource. As a recap, the File Share Witness is designated a vote in the Cluster when needed and can act as a tie breaker in case there is ever a split between nodes (mainly seen in multi-site scenarios).

I don’t want to go through the list of all the requirements but do want to focus on one in particular.

The Windows Server holding the file share must be domain joined and a part of the same forest.

The reason for this is that Failover Cluster utilizes Kerberos for the Cluster Name Object (CNO) to connect and authenticate the share. Therefore, the share must reside on a domain member that is in the same active directory forest.

There are scenarios where this is not possible. These scenarios are:

No or extremely poor Internet access because of a remote location, so cannot use a Cloud Witness

No shared drives for a disk witness. This could be a Storage Spaces Direct hyper-converged configuration, SQL Server Always On Availability Groups (AG), Exchange Database Availability Group (DAG), etc. All of which do not utilize shared disks.

A domain controller connection is not available as the cluster has been dropped behind a DMZ

A workgroup or cross-domain cluster where there in no active directory CNO object

We have had a lot of requests over the years for how to get around these scenarios and there wasn’t a good story for it. Well, I am here to tell you we listened, and we produced something better than a workaround.
In comes Windows Server 2019 and the new File Share Witness feature to the rescue.

We can now create a File Share Witness that does not utilize the CNO, but in fact, simply uses a local user account on the server the FSW is connected to.

This means NO kerberos, NO domain controller, NO certificates, and NO Cluster Name Object needed. While we are at it, NO account needed on the nodes. Oh my!!

The way it works is that on the Windows Server you wish to place the FSW, create a local (not administrative) user account, give that local account full rights to the share, connect the cluster to the share.

Let’s take for example, I have a server called SERVER and a share called SHARE I want to utilize as the File Share Witness. For creating this type of File Share Witness can only be done through PowerShell. The steps for setting this up are:

Log on to SERVER and create a local user account (i.e. FSW-ACCT)

Create a folder on SERVER and share it out

Give the local user account (FSW-ACCT) full rights to the share

Log in to one of your cluster nodes and run the PowerShell command:

Set-ClusterQuorum -FileShareWitness \\SERVER\SHARE -Credential $(Get-Credential)

You will be prompted for the account and password for which you should enter SERVER\FSW-ACCT and the password.

Viola!! You are done as we just took care of all the above scenarios. The cluster will keep the name and password encrypted and not accessible by anyone.

Just as an FYI, the original demo of this feature was using a USB thumb drive holding the share plugged into a router. Not that we would recommend doing it, but does show how far you could take this.

Please try out this new feature and provide feedback through the Feedback Hub app.

Thanks,
John Marlin
Senior Program Manager
High Availability and Storage
Click to expand...

Source: New File Share Witness Feature in Windows Server 2019 | Clustering and High-Availability

Brink · Feb 19, 2020

New File Share Witness Feature in Windows Server 2019

This blog discusses a new feature in the upcoming release of Windows Server 2019. Currently, Windows Insiders receive current builds of Server 2019. We urge you to become an Insider and play a part in making Windows Server 2019 the best that it can be. To do so, go to this link and sign up.

One of the quorum models for Failover Clustering is the ability to use a file share as a witness resource. As a recap, the File Share Witness is designated a vote in the Cluster when needed and can act as a tie breaker in case there is ever a split between nodes (mainly seen in multi-site scenarios).

I don’t want to go through the list of all the requirements but do want to focus on one in particular.

The Windows Server holding the file share must be domain joined and a part of the same forest.

The reason for this is that Failover Cluster utilizes Kerberos for the Cluster Name Object (CNO) to connect and authenticate the share. Therefore, the share must reside on a domain member that is in the same active directory forest.

There are scenarios where this is not possible. These scenarios are:

No or extremely poor Internet access because of a remote location, so cannot use a Cloud Witness

No shared drives for a disk witness. This could be a Storage Spaces Direct hyper-converged configuration, SQL Server Always On Availability Groups (AG), Exchange Database Availability Group (DAG), etc. All of which do not utilize shared disks.

A domain controller connection is not available as the cluster has been dropped behind a DMZ

A workgroup or cross-domain cluster where there in no active directory CNO object

We have had a lot of requests over the years for how to get around these scenarios and there wasn’t a good story for it. Well, I am here to tell you we listened, and we produced something better than a workaround.
In comes Windows Server 2019 and the new File Share Witness feature to the rescue.

We can now create a File Share Witness that does not utilize the CNO, but in fact, simply uses a local user account on the server the FSW is connected to.

This means NO kerberos, NO domain controller, NO certificates, and NO Cluster Name Object needed. While we are at it, NO account needed on the nodes. Oh my!!

The way it works is that on the Windows Server you wish to place the FSW, create a local (not administrative) user account, give that local account full rights to the share, connect the cluster to the share.

Let’s take for example, I have a server called SERVER and a share called SHARE I want to utilize as the File Share Witness. For creating this type of File Share Witness can only be done through PowerShell. The steps for setting this up are:

Log on to SERVER and create a local user account (i.e. FSW-ACCT)

Create a folder on SERVER and share it out

Give the local user account (FSW-ACCT) full rights to the share

Log in to one of your cluster nodes and run the PowerShell command:

Set-ClusterQuorum -FileShareWitness \\SERVER\SHARE -Credential $(Get-Credential)

You will be prompted for the account and password for which you should enter SERVER\FSW-ACCT and the password.

Viola!! You are done as we just took care of all the above scenarios. The cluster will keep the name and password encrypted and not accessible by anyone.

Just as an FYI, the original demo of this feature was using a USB thumb drive holding the share plugged into a router. Not that we would recommend doing it, but does show how far you could take this.

Please try out this new feature and provide feedback through the Feedback Hub app.

Thanks,
John Marlin
Senior Program Manager
High Availability and Storage
Click to expand...

Source: New File Share Witness Feature in Windows Server 2019 | Clustering and High-Availability

robos · Feb 19, 2020

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