Applications Login issues
For Microsoft account
Reset your Mircosoft password
Komatsu account team can not reset your password.
Referenc:e : Reset password for Microsoft account.
For Non-Microsoft account users (If you are using Azure Active Directory with a corporate Office 365 etc)
Please contact IT administrator of your organization.
Komatsu account team can not confirm your organization Azure Active Directory.
For Microsoft account users: Please refer Microsoft website
Microsoft Account Support Page