You can use Azure activity logs to find deployment errors for troubleshooting purposes. Information in these logs is available for 90 days. See Azure Documentation
Center.
- From the Azure portal, select the resource group.
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Under Support + Troubleshooting, select Activity log.
In the Activity Log blade, you will see a summary of recent operations for all of the resource groups in your subscription. It includes a graphical representation of the time and status of the operations, as well as a list of operations.