How do I remove duplicate SPN in Active Directory?
To remove an SPN:
- Click Start, point to All Programs, click Accessories, right-click Command Prompt, and then click Run as administrator.
- If the User Account Control dialog box appears, confirm that the action it displays is what you want, and then click Continue.
Why are duplicate SPNs bad?
In the case of a duplicate SPN, what can happen is that the KDC will generate a service ticket that may be created based on the shared secret of the wrong account. Then, when the client provides that ticket to the service during authentication, the service itself cannot decrypt it and the auth fails.
What is SetSPN command?
Setspn is a command-line tool that is built into Windows Server 2008. It is available if you have the Active Directory Domain Services (AD DS) server role installed. To use setspn, you must run the setspn command from an elevated command prompt.
How do I delete Spns?
Delete an SPN To remove an SPN, use the setspn -d service/name hostname command at a command prompt, where service/name is the SPN that is to be removed and hostname is the actual host name of the computer object that you want to update.
What is ad SPN?
A Service Principal Name (SPN) is a name in Active Directory that a client uses to uniquely identify an instance of a service. An SPN combines a service name with a computer and user account to form a type of service ID.
What is SPN in Active Directory?
A service principal name (SPN) is a unique identifier of a service instance. SPNs are used by Kerberos authentication to associate a service instance with a service logon account. This allows a client application to request that the service authenticate an account even if the client does not have the account name.
How do I change my Active Directory SPN?
Configure Service Principal Names (SPN)
- On the Domain Controller machine, start Active Directory Users and Computers.
- Select View > Advanced.
- Under Computers, locate one of the Network Controller machine accounts, and then right-click and select Properties.
- Select the Security tab and click Advanced.
How many Spns Can an account have?
1 Answer. Show activity on this post. Yes, this is a fundamental issue with SPN’s, you can’t have more than one SPN for a URL on a single server.
What is Active Directory SPN?
How do I delete SPNs?
Can you have multiple SPNs?
A given service instance can have multiple SPNs if there are multiple names that clients might use for authentication. For example, an SPN always includes the name of the host computer on which the service instance is running, so a service instance might register an SPN for each name or alias of its host.