Hoping someone can help as we are experiencing the same issue. 502 ERROR pid=1468 tid=MainThread file=base_modinput.py:log_error:309 | HTTP Request error: 401 Client Error: Unauthorized for url: https://reports.office365.com/ecp/reportingwebservice/reporting.svc/MessageTrace?$filter=StartDate%20eq%20datetime'2020-10-01T00:00:00Z'%20and%20EndDate%20eq%20datetime'2020-10-01T01:00:00Z' We are running TA-MS_O365_Reporting version 1.2.1 from our cloud add-hoc search head and are receiving the above error.  We tried this from our on-premise HF but also received same results.  Wondering if this is a permissions issue into 0365.  Is there any specific permissions for the service account for this to work? ... View more