Azure Migrate
A central hub of Azure cloud migration services and tools to discover, assess, and migrate workloads to the cloud.
925 questions
Cannot upload csv file for azure migrate discovery
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雨函 劉
5
Reputation points
I want to upload my VM information using csv file for Azure Migrate discovery to create assessment. However, I got error message said that my file extension "csv" is not allowed. It's weird since that in this page, I could only select my csv file, but now said I cannot use csv file?
Even I uploaded the template file from azure, it still failed. Any bugs there?
Azure Migrate
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![](data:image/svg+xml, %3Csvg xmlns='http://www.w3.org/2000/svg' height='64' class='font-weight-bold' style='font: 600 30.11764705882353px "SegoeUI", Arial' width='64'%3E%3Ccircle fill='hsl(96, 21%, 19%)' cx='32' cy='32' r='32' /%3E%3Ctext x='50%25' y='55%25' dominant-baseline='middle' text-anchor='middle' fill='%23FFF' %3EHW%3C/text%3E%3C/svg%3E)
Helmut Weiss 0 Reputation points2025-03-25T09:48:50.8966667+00:00 same problem here today. Was working some weeks ago.
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![](data:image/svg+xml, %3Csvg xmlns='http://www.w3.org/2000/svg' height='64' class='font-weight-bold' style='font: 600 30.11764705882353px "SegoeUI", Arial' width='64'%3E%3Ccircle fill='hsl(140.8, 77%, 23%)' cx='32' cy='32' r='32' /%3E%3Ctext x='50%25' y='55%25' dominant-baseline='middle' text-anchor='middle' fill='%23FFF' %3ESR%3C/text%3E%3C/svg%3E)
Srinivasa Reddy Jaggavarapu 1,560 Reputation points Microsoft External Staff Moderator2025-03-26T18:44:48.7533333+00:00 Hi 雨函 劉,
The issue with the file extension when trying to upload your CSV file for Azure Migrate discovery. The error message indicating that the "csv" file extension is not allowed could be due to a few reasons
Ensure that your CSV file is properly formatted and UTF-8 encoded. If the file is not encoded correctly, it might not be recognized as a valid CSV file and check the size of your CSV file it should not exceed 1 GB.
Make sure that the file is not open in any other program when you attempt to upload it.If you are using a template file, ensure that you have not altered the structure or format of the template in a way that could cause it to be invalid.
If you checked all these factors and are still facing issues, it may be worth trying to re-download the template and fill it out again to ensure there are no hidden formatting issues.
Please refer below documentation links for additional information:
https://learn.microsoft.com/en-us/azure/migrate/tutorial-discover-import#prepare-the-csv
https://learn.microsoft.com/en-us/viva/insights/advanced/admin/upload-org-data-first#file-upload
let us know if any help, we will always help as you needed.!
If the answer is helpful, please and "Upvote it".
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Srinivasa Reddy Jaggavarapu 1,560 Reputation points Microsoft External Staff Moderator
2025-03-27T18:45:19.1766667+00:00 Hi 雨函 劉,
If you had a chance to see my comment to your question. If it was helpful, please click "Upvote" on my post let us know Thank you...!
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雨函 劉 5 Reputation points
2025-03-28T12:12:46.7333333+00:00 Hi @Srinivasa Reddy Jaggavarapu ,
I had tried all the way you provided, but still failed. I finally successed in another laptop, but I still tried many times then. And until now, when I using my laptop to upload, it still get the same error even the file is the one had been successfully uploaded in another laptop.
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Helmut Weiss 0 Reputation points
2025-03-28T15:11:53.4766667+00:00 still same issue, even with template file
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Srinivasa Reddy Jaggavarapu 1,560 Reputation points Microsoft External Staff Moderator
2025-03-28T19:05:36.5933333+00:00 Hi 雨函 劉,
Thank you for your patience and for trying the steps I provided earlier. Since you mentioned that the file was successfully uploaded on another laptop, it seems like the issue might be specific to your current laptop's configuration or settings.
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