Boot Diagnostics shows screenshot of login page but cannot sign in with Bastion

Question

Boot Diagnostics shows screenshot of login page but cannot sign in with Bastion

Jaanyl Joseph 0

Getting error message the target machine is either currently unreachable or username/password is not correct. Please re-verify your credentials. If the problem persists, please contact support.

Manish Deshpande 1,500 Reputation points Microsoft External Staff Moderator

2025-12-10T20:40:35.14+00:00
Hello @Jaanyl Joseph

Thank you for reaching out. We're looking into the Bastion login issue and would appreciate your help by answering these questions.

When did the login problem first pop up?

Have there been any recent changes—like OS updates, new apps, policy tweaks, password resets, network updates, or NSG rule changes?

Is this affecting everyone or just a specific user?

In Boot Diagnostics, do you see the full OS login screen or any startup errors?

Is the VM running normally without any health alerts?

Did you recently change the VM password or disable any accounts?

Do the credentials work on another VM or if you use Run Command on the same VM?

For Windows: Is the RDP service up and listening on port 3389?

For Linux: Is SSH running, and has anything changed in etc-ssh-sshd_config?

Is the OS domain-joined? If yes, can domain login work on other machines?

Thanks,
Manish Deshpande.
Jaanyl Joseph 0 Reputation points

2025-12-11T00:39:33.2833333+00:00
Hi Manish,

Thank you for reaching out,

The login issue first popped up today everything worked fine earlier in the day. I also have a few users using the Remote Desktop Client on PC which also stopped.

I can see that a few updates ran within today

Everyone is affected

Yes the boot dignostics has the full os login screen

the Vm is running normally and is active

No VM password changes

The Credentials worked when i changed the network settings to allowRD source to any and used the downloaded the RDP file but still no bastion access or remote desktop client access

Yes that is correct it is on 3389, but i notices something within the VM it says the RD licensing grace has expired.

Windows is used

Yes domain is joined it does not work on other machines
Manish Deshpande 1,500 Reputation points Microsoft External Staff Moderator

2025-12-18T03:30:57.2633333+00:00

Hello @Jaanyl Joseph

I have requested some details in our private chat. Could you please provide the information at your earliest convenience?
Manish Deshpande 1,500 Reputation points Microsoft External Staff Moderator

2025-12-22T02:27:47.6733333+00:00

Hello @jaanyl joseph

I just wanted to kindly follow up to check if you had a chance to review my earlier response.
Manish Deshpande 1,500 Reputation points Microsoft External Staff Moderator

2025-12-23T02:49:26.74+00:00

Hello @Jaanyl Joseph

I just wanted to kindly follow up to check if you had a chance to review the earlier response. Please feel free to reach out if you have any additional questions or need further clarification. This information can help us to understand the issue better. Can we connect over a call to fix this issue. I have requested few details over the private message.
Manish Deshpande 1,500 Reputation points Microsoft External Staff Moderator

2025-12-25T07:37:37.8533333+00:00

Hello @Jaanyl Joseph

I just wanted to kindly follow up to check if you had a chance to review the earlier response. Please feel free to reach out if you have any additional questions or need further clarification. This information can help us to understand the issue better. Can we connect over a call to fix this issue. I have requested few details over the private message.

1 answer

Your answer

Manish Deshpande 1,500 Reputation points Microsoft External Staff Moderator

2025-12-10T20:40:35.14+00:00

Hello @Jaanyl Joseph

Thank you for reaching out. We're looking into the Bastion login issue and would appreciate your help by answering these questions.

When did the login problem first pop up?

Have there been any recent changes—like OS updates, new apps, policy tweaks, password resets, network updates, or NSG rule changes?

Is this affecting everyone or just a specific user?

In Boot Diagnostics, do you see the full OS login screen or any startup errors?

Is the VM running normally without any health alerts?

Did you recently change the VM password or disable any accounts?

Do the credentials work on another VM or if you use Run Command on the same VM?

For Windows: Is the RDP service up and listening on port 3389?

For Linux: Is SSH running, and has anything changed in etc-ssh-sshd_config?

Is the OS domain-joined? If yes, can domain login work on other machines?

Thanks,
Manish Deshpande.
Jaanyl Joseph 0 Reputation points

2025-12-11T00:39:33.2833333+00:00

Hi Manish,

Thank you for reaching out,

The login issue first popped up today everything worked fine earlier in the day. I also have a few users using the Remote Desktop Client on PC which also stopped.

I can see that a few updates ran within today

Everyone is affected

Yes the boot dignostics has the full os login screen

the Vm is running normally and is active

No VM password changes

The Credentials worked when i changed the network settings to allowRD source to any and used the downloaded the RDP file but still no bastion access or remote desktop client access

Yes that is correct it is on 3389, but i notices something within the VM it says the RD licensing grace has expired.

Windows is used

Yes domain is joined it does not work on other machines
Manish Deshpande 1,500 Reputation points Microsoft External Staff Moderator

2025-12-18T03:30:57.2633333+00:00

Hello @Jaanyl Joseph

I have requested some details in our private chat. Could you please provide the information at your earliest convenience?
Manish Deshpande 1,500 Reputation points Microsoft External Staff Moderator

2025-12-22T02:27:47.6733333+00:00

Hello @jaanyl joseph

I just wanted to kindly follow up to check if you had a chance to review my earlier response.
Manish Deshpande 1,500 Reputation points Microsoft External Staff Moderator

2025-12-23T02:49:26.74+00:00

Hello @Jaanyl Joseph

I just wanted to kindly follow up to check if you had a chance to review the earlier response. Please feel free to reach out if you have any additional questions or need further clarification. This information can help us to understand the issue better. Can we connect over a call to fix this issue. I have requested few details over the private message.
Manish Deshpande 1,500 Reputation points Microsoft External Staff Moderator

2025-12-25T07:37:37.8533333+00:00

Hello @Jaanyl Joseph

I just wanted to kindly follow up to check if you had a chance to review the earlier response. Please feel free to reach out if you have any additional questions or need further clarification. This information can help us to understand the issue better. Can we connect over a call to fix this issue. I have requested few details over the private message.

Answer 1

If you are encountering an error message indicating that the target machine is either unreachable or that the username/password is incorrect while using Azure Bastion, here are a few troubleshooting steps you can follow:

Verify Credentials: Ensure that you are using the correct username and password. For domain-joined VMs, use the UPN format (username@domain) instead of the domain\username format.
Check Network Connectivity: Use the Connection Troubleshoot feature in the Azure portal to diagnose connectivity issues. This tool can help identify if there are any network-related problems preventing access to the VM.
Just-in-Time Access: If Just-in-Time (JIT) access is enabled, ensure that you have the necessary permissions assigned to your user account to connect to the Bastion service.
Temporary Password: Make sure that the account you are trying to use does not have a temporary password, as these cannot be used for remote desktop connections.
Security Policy: For Azure AD joined VMs, ensure that the security policy Network security: Allow PKU2U authentication requests to this computer to use online identities is enabled on both the server and client.

If the issue persists after checking these points, consider reaching out to support for further assistance.

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Boot Diagnostics shows screenshot of login page but cannot sign in with Bastion

1 answer

Your answer