Hello @SakeriyeMohamud-4520 ,
Welcome to Microsoft Q&A Platform. Thank you for reaching out & hope you are doing well.
Can you sign in with azure active directory on bastion?
Standard SKU tier for Azure Bastion supports native client feature which lets you connect to your target VMs via Bastion using Azure CLI, and expands your sign-in options to include local SSH key pair and Azure Active Directory (Azure AD).
Refer : https://learn.microsoft.com/en-gb/azure/bastion/connect-native-client-windows
https://learn.microsoft.com/en-us/azure/active-directory/devices/howto-vm-sign-in-azure-ad-windows#log-in-using-azure-ad-credentials-to-a-windows-vm
https://learn.microsoft.com/en-us/security/benchmark/azure/baselines/bastion-security-baseline#im-3-use-azure-ad-single-sign-on-sso-for-application-access
Kindly let us know if the above helps or you need further assistance on this issue.
----------------------------------------------------------------------------------------------------------------
Please "Accept the answer" if the information helped you. This will help us and others in the community as well.