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Check if Azure resource is used

ph flag

Our team has inherited an old project with tons of Azure resources (roughly 1600 in 30+ subscriptions). We were tasked to determined, whether they are still used or can be removed. We were able to identify a vast majority of these services via ARM templates, PowerShell scripts, etc. However, there remains ~250 resources which we are not sure about.

Is there any simple way (Kusto query, API endpoint,...) to check whether a resource was actively used in the past 2-3 years? Some of our resources are used very irregularly (e.g.: only at the start of new year, during scale unit migration or as a backup during recovery), so the usual insights which go back only 30-90 days are not enough for us. We have also looked at the Azure Advisor, but it ignored a lot of resources which could be removed.

I am especially interested in these types of resources:

  • Cosmos DB
  • Key Vaults
  • SQL Servers/Databases
  • Storage accounts
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