# Need help creating a Dynamics Business Central S2S connection

**URL:** <https://connective.celigo.com/t/need-help-creating-a-dynamics-business-central-s2s-connection/6319>\
**Category:** Integrator.io\
**Tags:** microsoft-dynamics-365-business-central\
**Created:** [May 28, 2026, 4:33pm UTC](https://connective.celigo.com/t/need-help-creating-a-dynamics-business-central-s2s-connection/6319 "2026-05-28T16:33:16Z")\
**Posts on this page:** 3\
**Page:** 1

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**Author:** ![Jim\_Clarke](https://avatars.discourse-cdn.com/v4/letter/j/48db29/32.png) [@Jim\_Clarke](https://connective.celigo.com/u/Jim_Clarke)\
**Post date:** [May 28, 2026, 4:33pm UTC](https://connective.celigo.com/t/need-help-creating-a-dynamics-business-central-s2s-connection/6319/1 "2026-05-28T16:33:17Z")

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I am looking for help creating a S2S connection to MS Dynamics Business Central. Unfortunately the Celigo doc doesn't cover any of the details. I have done all of the steps that I find when I do a Google and/or Claude search, but I keep getting the error below.

Your test was not successful. Check your information and try again{"error":{"code":"Authentication\_InvalidCredentials","message":"The server has rejected the client credentials. CorrelationId: 7eaa671b-f454-4cd5-8323-6183dcd39eee."}}

Anyone have any tips?

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**Author:** ![dhazledevera](https://avatars.discourse-cdn.com/v4/letter/d/c57346/32.png) [@dhazledevera](https://connective.celigo.com/u/dhazledevera)\
**Post date:** [June 8, 2026, 2:10pm UTC](https://connective.celigo.com/t/need-help-creating-a-dynamics-business-central-s2s-connection/6319/2 "2026-06-08T14:10:39Z")

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Hi Jim,

Good morning! This error indicates:

1. Wrong Token URL
2. Wrong Scope
3. Missing "Register in Business Central" step
4. Make sure have admin access

Please check this document:  
Link: [https://docs.celigo.com/hc/en-us/articles/11933835192859-Create-an-OAuth-2-0-iClient-resource](https://docs.celigo.com/hc/en-us/articles/11933835192859-Create-an-OAuth-2-0-iClient-resource)

Thank you!

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**Author:** ![nuriensing](https://sea1.discourse-cdn.com/flex001/user_avatar/connective.celigo.com/nuriensing/32/6918_2.png) [@nuriensing](https://connective.celigo.com/u/nuriensing)\
**Post date:** [June 9, 2026, 6:22am UTC](https://connective.celigo.com/t/need-help-creating-a-dynamics-business-central-s2s-connection/6319/3 "2026-06-09T06:22:28Z")

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Hi,

You can also check this tutorial which I have written a while ago on the forum:

> [@Microsoft Dynamics 365 Business Central – OAuth Setup - Celigo Connection Tutorial](https://connective.celigo.com/t/microsoft-dynamics-365-business-central-oauth-setup-celigo-connection-tutorial/4943):
>
> Since there were no in-depth tutorials available on the Celigo Community, I decided to share a complete and practical guide. OAuth setup for Microsoft 365 Business Central can be tricky, so I’ve documented the full process to help you connect M365 to Celigo more easily: page_facing_up Provided by [Teknuro.com](http://Teknuro.com) For questions or implementation support, contact: [nuri@teknuro.com](mailto:nuri@teknuro.com):red\_exclamation\_mark:Background Microsoft has deprecated the use of Web Service Access Keys for Business Central On…