On October 1st, 2022, Microsoft is removing access to web services using Basic authentication. This week, many users have received a notification telling them they have a problem. In this video, I take a look at how to figure out what is going on, check it out:

https://youtu.be/KcIH3s7YbRE

The Telemetry Query needed:

traces
|where timestamp > ago(7d)
|where operation_Name == "Web Services Call"
     or customDimensions.eventId == "RT0008"
|where tostring(customDimensions.httpHeaders) contains "Basic"
|project timestamp
, aadTenantId = customDimensions.aadTenantId
, environmentName = customDimensions.environmentName
, environmentType = customDimensions.environmentType
, companyName = customDimensions.companyName
, alObjectId = customDimensions.alObjectId
, alObjectName = customDimensions.alObjectName
, alObjectType = customDimensions.alObjectType
, category = customDimensions.category
, endpoint = customDimensions.endpoint
, httpStatusCode = customDimensions.httpStatusCode
, httpHeaders = customDimensions.httpHeaders       
, executionTime = customDimensions.serverExecutionTime
, executionTimeInMS = toreal(totimespan(customDimensions.serverExecutionTime))/10000