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Postman Authentication for On Premise Business Central OData

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Posted on by Community Member

Hi ,

We were validating On Premise OData for Business Central entity. When we use the option to validate using GET with NTLM Authentication we get 401Unauthorized error - see below image.

We are Using Microsoft Dynamics 365 Business Central 2020 Release Wave 2 and Authentication with a Domain\username and secret web access key.

Please suggest what can be the missing part here.

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raelhefn on at

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Hi, It should works if you enable NTLM Authentication.

For more information, please take a look at this similar post, community.dynamics.com/.../how-to-use-basic-authentication-to-access-web-service-in-d365bc-server-in-a-vm

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YUN ZHU 95,593 Super User 2025 Season 2 on at

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Hi, is "Use NTLM Authentication" enabled on Business Central Administrator.

Hope this will help.

Thanks.

ZHU

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Community Member on at

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Hi YUN ZHU ,Thanks.

Tried as you mentioned. But still getting 401 when I have tried with Windows authentication.

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YUN ZHU 95,593 Super User 2025 Season 2 on at

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Hi, I re-tested it, and it seems that there is nothing wrong with it.

Just in case, please check the following options again.

Hope this will help.

Thanks.

ZHU

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