Azure billing schedule fails with error: Cannot retrieve billing data, Response code 400: Method failedDescription<!-- div.margin{ padding: 10px 40px 40px 30px; } table.tocTable{ border: 1px solid; border-color:#E0E0E0; background-color: rgb(245, 245, 245); padding-top: .6em; padding-bottom: .6em; padding-left: .9em; padding-right: .6em; } table.noteTable{ border:1px solid; border-color:#E0E0E0; background-color: rgb(245, 245, 245); width: 100%; border-spacing:2; } table.internaltable { white-space:nowrap; text-align:left; border-width: 1px; border-collapse: collapse; font-size:14px; width: 85%; } table.internaltable th { border-width: 1px; padding: 5px; border-style: solid; border-color: rgb(245, 245, 245); background-color: rgb(245, 245, 245); } table.internaltable td { border-width: 1px; padding: 5px; border-style: solid; border-color: #E0E0E0; color: #000000; } .title { color: #D1232B; font-weight:normal; font-size:28px; } h1{ color: #D1232B; font-weight:normal; font-size:21px; margin-bottom:-5px } h2{ color: #646464; font-weight:bold; font-size:18px; } h3{ color: #000000; font-weight:BOLD; font-size:16px; text-decoration:underline; } h4{ color: #646464; font-weight:BOLD; font-size:15px; text-decoration:; } h5{ color: #000000; font-weight:BOLD; font-size:13px; text-decoration:; } h6{ color: #000000; font-weight:BOLD; font-size:14px; text-decoration:; } ul{ list-style: disc outside none; margin-left: 0; } li { padding-left: 1em; } --> Symptoms Azure billing schedule works only for most recent months. It doesn't work for previous months before certain point of time. For example, when running the schedule for a month in 2019, it works. However when running it for any month in 2018, error is thrown. Sample error message: Cannot retrieve billing data from https://consumption.azure.com/v3/enrollments/xxxxx/usagedetails/download?billingPeriod=201812. Response code 400: Method failed: (/v3/enrollments/xxxxx/usagedetails/download) with code: 400 Cause According to Azure billing API doc:https://docs.microsoft.com/en-us/azure/billing/billing-enterprise-apiCode 400 means:Invalid params – Date ranges, EA numbers etc.Thus the cause is the data for previous month is not available in Azure for your account.Please login the EA portal and verify.https://ea.azure.com