Apple quickly updated the windows migration assistant software to include compatibility with MacOS Big Sur. As imore found, version 126.96.36.199 of the utility provides support for users who want to migrate their data from windows PCs to Apple's latest Mac operating system.
Windows migration assistant can package user's contact, calendar, e-mail account from windows machine, and migrate data to corresponding location of Mac OS. After this process is completed,AppleUsers are advised to authorize Mac to purchase in the itunesstore.
For more information about Windows migration assistants, check out Apple's updated support article:https://support.apple.com/en-us/HT204087