Upgrading from AX 2012 to Dynamics 365 Finance & Operations (F&O) involves some key phases and steps like analysing and planning, analysing your AX 2012 environment for customization and data volume to estimate effort. Which is also used to define your plan, your project in this way like you can define your timeline, your budget on the plan, your resources which helps in creating a detailed cutover plan. Upgrading from AX 2012 to Dynamics 365 Finance & Operations is upgrade in code which is helpful in running this tool in LCS which will provide you AX 2012 model to generate analysis reports and start covering code in the dynamic 365 format, and there another Azure DevOps which will link your LCS project to Azure DevOps which is helpful in managing your change code. Data preparation and upgrade helps in Cleanse data and running the ModelElement table replication script and the Data Migration Toolkit are very easy to download and use the latest toolkit from LCS for migrating data into. In Testing and validation these two tools are very good in use one is sandbox testing which performs functional and technical testing in a sandbox environment and the second one is Mock cutovers which helps in conducting trial cutovers which help in refine your cutover plan and resolve issues before going live. 

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