SAP Business One: "5.7.3 Authentication unsuccessful" - Microsoft Entra ID

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SAP Business One: "5.7.3 Authentication unsuccessful" - Microsoft Entra ID

Andreas Bart 0

Hello,

I am not able to connect to my mail account:
I receive following error message within Sap Business One:
Benutzerbild

The username and the client secret should be correct.

Do you have any idea?

Furthermore, I am not able to execute this two commands:
New-ServicePrincipal -AppId <Client ID of the registered application> -ObjectId <Object ID of the enterprise application>

Add-MailboxPermission -Identity "<Email address>" -User <Object ID of the enterprise application> -AccessRights FullAccess

I inserted my data, but is is still not working.

Best regards,
Andreas

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Answer 1

Helen Luu 3,300 Unabhängiger Berater

Hello @Andreas Bart,

Since I noticed that you are communicating in English, I will also use English to keep our conversation clear and fluent.

Regarding your issue, I understand that you are currently unable to connect to your mail account and are receiving the error message in SAP Business One "5.7.3 Authentication unsuccessful - wrong username or password". As an initial step, if the system prompts for authentication, please try logging in using the Client ID and Client Secret associated with your registered application.

Additionally, if you want to restrict or explicitly allow the application to access specific mailboxes, you can configure an Application Access Policy using Exchange Online PowerShell. Please refer to the example below:

New-ApplicationAccessPolicy -AppId <ServicePrincipalAppId> -PolicyScopeGroupId <PolicyScopeGroupId> -Description "Full access to mailbox"-AccessRight "FullAccess"

This command allows you to control which users or groups the application can access, which could help resolve authentication or authorization issues.

For more detailed guidance, you may refer to the official Microsoft documentation: New-ApplicationAccessPolicy (ExchangePowerShell) | Microsoft Learn

Please review the above steps and let me know if the issue persists or if you need further assistance.

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Andreas Bart 0 Zuverlässigkeitspunkte

2026-05-19T06:13:32.6966667+00:00

Hello @Helen Luu
thank you for your answer.
I tried to login with the client id and client secret.
I also double checked if the id and secret is right. But it always says that the authentication failed.
I have done everything like it is described from sap.
https://help.sap.com/docs/SAP_BUSINESS_ONE_ADMIN_GUIDE_SQL/f6fb230cc90949d8b66586a39189992b/dba48b1e2d624648b9079b8e1d76c49b.html?locale=en-US&version=10.0_SP_2602
https://help.sap.com/docs/SAP_BUSINESS_ONE_ADMIN_GUIDE_SQL/f6fb230cc90949d8b66586a39189992b/b19b2e4e8ba64e25bfd7c3b82cf62fdb.html?locale=en-US&version=10.0_SP_2602

Best regards,
Andreas
Helen Luu 3,300 Zuverlässigkeitspunkte Unabhängiger Berater

2026-05-19T06:50:13.7766667+00:00
Hello @Andreas Bart,

Thanks for your provided article, I understand about the issue you are experiencing.

New-ServicePrincipal -AppId <Client ID of the registered application> -ObjectId <Object ID of the enterprise application> Add-MailboxPermission -Identity "<Email address>" -User <Object ID of the enterprise application> -AccessRights FullAccess

May I know what is the output error when you are trying to execute those commands? Could you please share me the screenshot of it?
Andreas Bart 0 Zuverlässigkeitspunkte

2026-05-19T06:57:42.28+00:00

Hello @Helen Luu
I receive following error message for both commands:
Helen Luu 3,300 Zuverlässigkeitspunkte Unabhängiger Berater

2026-05-19T07:01:13.6366667+00:00
Hello @Andreas Bart,

Have you tried to install Exchange Online module and then running Connect-ExchangeOnline to sign in with your admin account?

Install-Module -Name ExchangeOnlineManagement Import-module ExchangeOnlineManagement Connect-ExchangeOnline

You will need to run Connect-ExchangeOnline whenever you reopen the PowerShell. Then, please help me to run New-ServicePrincipal again.
Andreas Bart 0 Zuverlässigkeitspunkte

2026-05-19T07:12:47.24+00:00

Hi @Helen Luu
yes I have done it but still the same error:
Helen Luu 3,300 Zuverlässigkeitspunkte Unabhängiger Berater

2026-05-19T07:23:04.55+00:00
Hello @Andreas Bart,

Could you please run this command to check the permission? What is the output of it?

$Perms = Get-ManagementRole -Cmdlet New-ServicePrincipal $Perms | foreach {Get-ManagementRoleAssignment -Role $_.Name -Delegating $false | Format-Table -Auto Role,RoleAssigneeType,RoleAssigneeName}

Furthermore, you can check whether you can test with this command to check if the PowerShell works correctly

Get-Recipient <your email>
Andreas Bart 0 Zuverlässigkeitspunkte

2026-05-19T07:27:13.4566667+00:00

Hello @Helen Luu
here the output:
Helen Luu 3,300 Zuverlässigkeitspunkte Unabhängiger Berater

2026-05-19T11:46:45.7666667+00:00

Hello @Andreas Bart,

Could you please let me know which administrator role you are assigned to execute the command? Is it Exchange Administrator or Global Administrator?
Andreas Bart 0 Zuverlässigkeitspunkte

2026-05-19T12:00:12.5633333+00:00

Hi @Helen Luu
which admin do you mean. The one which I opened Powershell or the one one I logged in to the outlook account?
Helen Luu 3,300 Zuverlässigkeitspunkte Unabhängiger Berater

2026-05-20T06:31:38.37+00:00

Hello @Andreas Bart,

The account that you are signing in with Connect-ExchangeOnline. Is it Global Administrator or Exchange Administrator?
Deleted

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Andreas Bart 0 Zuverlässigkeitspunkte

2026-05-20T08:51:19.25+00:00

Hi @Helen Luu
I was now able to solve the problem with the authentication. I executed the power shell commands.
I tried now to send an email from sap b1, but I received this error:
430 4.2.0 STOREDRV; mailbox logon failure; STOREDRV.Submission.Exception:ConnectionFailedTransientException.MapiExceptionLogonFailed; Failed to process message due to a transient exception with message [BeginDiagnosticData]Cannot open mailbox.

Do you maybe have an idea why?
Andreas Bart 0 Zuverlässigkeitspunkte

2026-05-20T14:11:41.94+00:00

Hi @Helen Luu
I was able to sent the email. Maybe it just needed some time to work.
Thank you for your help.
Helen Luu 3,300 Zuverlässigkeitspunkte Unabhängiger Berater

2026-05-21T09:17:22.29+00:00

Hello @Andreas Bart,

Glad to hear that your issue is now resolved.

Thank you so much for your time and if you have any further concern, please feel free to let me know.