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Tag Name Policy Impact on System Tags

Guo, Jianning 60 Reputation points
2025-07-02T15:45:23.1266667+00:00

Hello,

I’m working to standardize our custom tag names using Azure Policy to enforce all lower cases.

Before test the policy, I ran the following query:

Resources

| project tags

| summarize buildschema(tags)

I noticed several system-assigned tag names with mixed casing (a combination of upper and lower case).

My question is: If I enforce the policy above, will it affect the casing of system-assigned tags?

If so, could this potentially cause any operational impact?

Thank you for your support.

Azure Policy
Azure Policy
An Azure service that is used to implement corporate governance and standards at scale for Azure resources.
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  1. Ashok Gandhi Kotnana 10,430 Reputation points Microsoft External Staff Moderator
    2025-07-02T16:43:31.7333333+00:00

    Hi @Guo, Jianning

    Azure Policy does not modify system-assigned tags—such as those automatically applied by Azure. So, you cannot modify system-assigned tags in Azure.

     User-defined tags can be modified using Azure Policy. However, before enforcing such changes, ensure that no automation scripts, processes, or operational dependencies rely on the original tag names or casing to avoid unintended disruptions.

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