Hi Ak-Bim Teknik
Based on the error message you provided, it seems that you need to update your sign-in to a managed tenant Work or School Account (WSA) to access VLSC.
Option 1 is to try using the user ID and password that you used for Microsoft online services, if your organization uses them.
Option 2 is to create a new Work or School account to use with VLSC. When asked to verify your corporate email, enter the email address listed in the license or agreement at VLSC (******@ak-bim.com.tr).
Option 3 is to contact your IT Administrator to help take ownership of your domain.
For more information about sign-in to VLSC, you can visit Frequently Asked Questions for sign-in. | Microsoft Learn.
Hope it helps.
Kind regards,
Lei