Thank you for asking this question on the Microsoft Q&A Platform.
I understand that you are unable to login into HMD Device kit application and when you trying to login you got an error: AADSTS90072: User account '***@gmail.com' from identity provider 'live.com' does not exist in tenant 'HMD Global Oy' and cannot access the application.
The reason you are unable to access to this application is you are using a personal Gmail account to login, which does not have access to application. in order to access this application your account must be added as an external user in the tenant first and try to access the application, this part is done by admin of the tenant, kindly reach admin to grant access to the application.
Add a guest user and send an invitation
https://learn.microsoft.com/en-us/answers/questions/886246/error-details-aadsts50020
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Thanks,
Akhilesh V.
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