Event ID 1055: The processing of Group Policy failed
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Windows 10.0.26200.0, 2026-10-28; the notes are ours, based on Microsoft's
security auditing reference.
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).
The RD Session Host Server is configured to use a certificate but is unable to access the private key associated with this certificate.
The RD Session Host Server is configured to use a certificate but is unable to access the private key associated with this certificate. … The SHA1 hash of the certificate is in the event data. The default certificate will be used for RD Session Host Server authentication from now on. Please check the security settings by using the Remote Desktop Session Host Configuration tool in the Administrative Tools folder.
RDMA rundown is active.
Event 1055
SMBServer
SMBServer/Operational log
Information
Message and fields (as Event Viewer shows them)
RDMA rundown is active. Active RDMA-based operations will be wound down. There are currently … active RDMA resources.