The minimum supported version of web server is Windows 2003 with IIS 6. Since most customers and partners do not want to install any un-needed software on their production servers, we have enabled the remote migration scenario to allow you migrate any web server remotely to azure without ever installing any software on your production server. The migration tool for Windows Server works either from the local machine, or from a remote machine. It allows you to migrate sites from IIS running on Windows Server 2003 onwards.
The Migration Assistant tool is available as open source from Microsoft, the license terms and source code are available for your review. Install will start automatically. We will use the Migration Assistant to scan the following information on IIS server and identify readiness for website migration to Azure App Service:
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If you have already run the tool, you can upload the readiness report to check the compatibility of your sites. Readiness Assessment available here.