We are seeing this on our RDS server:
Log Name: Microsoft-Windows-User Device Registration/Admin
Source: Microsoft-Windows-User Device Registration
Date: 12/06/2020 13:59:26
Event ID: 304
Task Category: None
Level: Error
Keywords:
User: SYSTEM
Computer: %computername%.domain.local
Description:
Automatic registration failed at join phase. Exit code: Unknown HResult Error code: 0x801c001d. Server error: empty. Debug Output:\r\n joinMode: Join
drsInstance: undefined
registrationType: undefined
tenantType: undefined
tenantId: undefined
configLocation: undefined
errorPhase: discover
adalCorrelationId: undefined
adalLog: undefined
adalLog: undefined
adalResponseCode: 0x0
.
Event Xml:
304
0
2
0
0
0x8000000000000000
9946
Microsoft-Windows-User Device Registration/Admin
%computername%.domain.local
-2145648611
empty
joinMode: Join
drsInstance: undefined
registrationType: undefined
tenantType: undefined
tenantId: undefined
configLocation: undefined
errorPhase: discover
adalCorrelationId: undefined
adalLog: undefined
adalLog: undefined
adalResponseCode: 0x0