@Deepak N S Thank you for reaching out to Microsoft Q&A. I understand that you are having questions regarding metadata exception while trying to set it for Azure Blob.
Please note that- Beginning with version 2009-09-19, metadata names must adhere to the naming rules for C# identifiers. This goes for both Portal and SDK. Please refer to - https://learn.microsoft.com/en-us/rest/api/storageservices/naming-and-referencing-containers--blobs--and-metadata#metadata-names
There is no workaround for this at the moment. Please let us know if you have any more questions and we will be glad to assist you further. Thank you!
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