Hello @sanimesainc
If you change jobs or lose access to the email associated with your community account, we are able to map your existing account to a newly created account so that you don't lose any community contributions.
The Power BI community does require an AAD account. If the account you would like to use is not AAD, you can create one for free by following 'I Need an Organizational Account' in this support article: https://community.powerbi.com/t5/Community-Accounts-Registration/How-to-Register-for-a-Power-BI-Comm...
Here is what I would suggest, if your new email account is not AAD, follow the instructions I just linked for 'I Need an Organizational Account', then proceed below to open a support case and have your old account and new account mapped. If your new account is AAD, proceed with opening a support case for the mapping:
To open a support case, visit https://docs.microsoft.com/en-us/power-bi/power-bi-cannot-sign-in. Please include the community user/profile name and email address you previously used to log into the community, as well as the newly created community user/profile name and email address of the account you create.
Please let me know if you need further assistance or have questions!
