Thanks for reaching out to us on the Microsoft Q&A forum.
Power BI doesn't specifically restrict the use of Hotmail accounts for licensing or subscription purposes. However, there could be certain limitations or issues related to using Hotmail accounts with Azure subscriptions, which might indirectly affect Power BI access.
Power BI has some restrictions on using email addresses from consumer email services or telecommunications providers for sign-ups. To complete the signup process, you'll need to use an email address provided by your work or school. This requirement ensures security and compliance with organizational policies.
If you are still facing any issue, please let us know in the comments. We are glad to help you.
If the information is helpful, please Accept Answer so that it would be helpful to community members.
Thank you.