In order to run the command above successfully, we first need to create a security group in which we insert all computers the gMSA will be later assigned to and therefore are able to retrieve the managed password. New-ADServiceAccount -Name svcSQL-MSA -DNSHostName -PrincipalsAllowedToDelegateToAccount “gMSA” -ManagedPasswordIntervalInDays 30 New-ADServiceAccount -Name -DNSHostName -PrincipalsAllowedToRetrieveManagedPassword -ManagedPasswordIntervalInDays We can now create our first gMSA account with the PowerShell on a domain controller. In a new environment if no key already exists you can create one with the following cmdlet In my lab environment already one exists. To check if a KDS Root Key already exists use the following cmdlet The Key Distribution Service (KDC) should be restarted on all domain controllers if the root key is recreated.
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gMSA password retrieval failures can also occur when using DCs with limited replication schedules or if there is a replication issue.ĭeleting and recreating the root key may lead to issues where the old key continues to be used after deletion due to caching of the key. If you try to use a gMSA too soon the key might not have been replicated to all domain controllers and therefore password retrieval might fail when the gMSA host attempts to retrieve the password. The 10 hours is a safety measure to prevent password generation from occurring before all DCs in the environment are capable of answering gMSA requests.
The domain controllers will wait up to 10 hours from time of creation to allow all domain controllers to converge their AD replication before allowing the creation of a gMSA. The sMSA instead was tied to a single computer.Ĭreate the Key Distribution Services KDS Root Keyĭomain Controllers (DC) require a root key to begin generating gMSA passwords. The Group in Group Managed Service Account (gMSA) stands for the ability to assign one gMSA to a group of computers. To create a standalone managed service account which is linked to a specific computer, use the RestrictToSingleComputer parameter. By default, the cmdlet creates a group managed service account. The New-ADServiceAccount cmdlet creates a new Active Directory managed service account.
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Since Windows Server 2012, the Windows PowerShell cmdlets default to managing the group Managed Service Accounts instead of the server Managed Service Accounts.įorce to create a Standalone Managed Service Account (sMSA) in Windows Server 2012 and later. Managed Service Accounts: Understanding, Implementing, Best Practices, and Troubleshooting GMSA’s are specific user accounts in Active Directory and extends the successor Standalone Managed Service Accounts (sMSA).Ī great documentation with technical background and details about sMSA you will find below. Today we want to set up and pay attention to Group Managed Service Accounts (gMSA) who was introduced in Windows Server 2012 and Windows 8.
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