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Every guide on the site, most recently updated first. Each one opens with the answer, lists its sources with the day they were checked, and says when it last changed.
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Application Insights
Agent-based dependency tracking: what the Application Insights Agent sees and misses
How the Application Insights Agent collects SQL and HTTP dependencies on IIS, when the instrumentation engine is needed, and what still needs code.
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Application Insights
App Service auto-instrumentation vs the SDK: which one to run
What Application Insights auto-instrumentation collects on App Service, Functions, AKS and IIS, when to move to code, and why one collector per app is enough.
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Application Insights
Application Insights pricing: what you pay for, and how to cut the bill
Application Insights bills by the GB its Log Analytics workspace ingests. Current East US prices, the free allowance and retention, and what to change first.
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Application Insights
ApplicationInsights.config: do you still need it, and what replaced it
What ApplicationInsights.config controls, which apps still read it, and where its settings went in SDK 3.x and the Microsoft OpenTelemetry Distro.
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Application Insights
Application Insights for ASP.NET MVC and Web API on .NET Framework
What still works for ASP.NET MVC and Web API on .NET Framework, the HTTP modules, unhandled vs handled exceptions, trace forwarding, and the SDK 3.x upgrade.
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Application Insights
Azure Monitor alerts explained: log alerts, action groups and the alert email
What an Azure Monitor alert email means, metric vs log search alerts, action groups, a log alert over KQL step by step, what alerts cost, and how to stop noise.
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Application Insights
Azure Monitor vs Application Insights vs Log Analytics
Azure Monitor is the platform, Log Analytics the workspace and its query tool, Application Insights the APM feature. Table names, storage, and what to query.
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Application Insights
Certificate expiration monitoring with Application Insights availability tests
Use Standard availability tests to catch expiring TLS certificates, set the lifetime check and alerts, price it, and when to use TrackAvailability instead.
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Application Insights
Application Insights SDK vs the OpenTelemetry Distro: which to use and how to migrate
Classic Application Insights SDK status, SDK 3.x vs the Microsoft OpenTelemetry Distro, a concept map from 2.x, and the migration steps.
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Application Insights
Client IP address and geolocation in Application Insights
Why client_IP shows 0.0.0.0, how Application Insights fills the city and country columns, how DisableIpMasking stores real IPs, and what proxies change.
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Application Insights
Correlation in Application Insights: trace context, operation_Id and Application Map
How operation_Id and operation_ParentId map to W3C trace context, why Application Map shows one node or none, and how to correlate work across queues.
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Application Insights
Query several Application Insights resources at once with KQL
Query many apps with KQL using one workspace, workspace() and app(); find a resource from its instrumentation key; join reference data; reuse dashboards.