The customer is seeing the following logs and would like understand the meaning.
NSD_POLICY_UNKNOWN_SRC_IDENTITY: There is unknown source identity in security policy.
No traffic impact is seen. only the records in the log files.
When the policy is configured with source identity, the SRX device may not learn or receive the corresponding user or group information immediately, resulting in the warning "NSD_POLICY_UNKNOWN_SRC_IDENTITY."
This warning does not affect functionality. User and group details will be updated on the SRX once the user authenticates and the authorization is completed successfully.