As per Microsoft: "In a distributed (RPC) application, either the client or server attempted to set authentication and authorization information for the binding between the client and server. However, the authentication service named by the application client or server is unknown to Windows".
An authentication service is unknown error can occur when a replication link exists between two Domain Controllers but replication cannot be properly performed. See "Troubleshooting Guidelines for Branch Office Environments" for information on troubleshooting this problem.
The following are some examples when this error occurred:
- M243008 - In this instance, the RPC Locator Service was uninstalled causing the error. Note that when the Client for Microsoft Networks is uninstalled, the RPC Locator Service is also uninstalled. For the IIS services to start and be enabled, the Client for Microsoft Networks must be installed. See M278416.
- 249828 - This issue can occur because of a Remote Procedure Call (RPC) issue with the HKEY_LOCAL_MACHINE\Software\Microsoft\RPC registry key on your computer. M259736 provides troubleshooting information on problems with the remote procedure call (RPC) registry information.
Symbolic name: RPC_S_UNKNOWN_AUTHN_SERVICE
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