403 Forbidden error in Postman connected to usconebox environment

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Posted on by Teevo

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Hi all,

I have set Postman Desktop to connect with my local Dev VM and already running well. So basically I want to try run my custom API with this Postman. It was something like below:

While it was running just fine, I currently change my local DB connection to my Tier-2 database. So when I'm calling http:////usconebox... the data being used and displayed is from my local SQL anymore, instead from Azure SQL (from my Tier-2 F&O installation). This being done after changing my Web.config to the Tier-2 SQL database. I changed these :

Problem now is in Postman I'm getting /403 - Forbidden/ error. May I know what authorization this Postman referring to ?

The error message accompany the 403 error code is below:

/Message/: /Please verify that the user is valid and set up correctly./

Btw, for the token is retrieved successfully, so it is not about no token, beside it is usually will be 401 Unauthorized error instead.

Thanks.

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Layan Jwei 8,165 Super User 2026 Season 1 on at

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Hi Teevo,

Did you make sure that you are pointing to the new UAT url when retrieving the access token?

Also did you define in UAT the clientId that you are using in postman?

Thanks,

Layan Jweihan

Please mark this answer as "Verified" if it solved your issue. In order to help others who will face a similar issue in the future

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Teevo 405 on at

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Hi Layan,

Basically I'm not changing anything in the Postman environment setup when change database connection to my Tier-2 DB (UAT).

And the way I get the token is like this :

The tenant_id = my Azure tenant

client id and secret = get from Azure as well (the app registration)

only resource is = https://usnconeboxax1aos.cloud.onebox.dynamics.com/.default

Did you mean I need to change this resource to my UAT (Tier-2) ? but the idea is to use my local code while the web.config for database is pointing to that UAT DB.

And what I mean by not changing anything in Postman environment setup is those setting also the one which able to run already when I'm using my local DB (before change web.config)

Is there anything I need to change with Postman setting ? That's why I want to know which user id (authorization) does the 403-Forbidden referring to ?

Thanks.

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Anthony Blake 3,092 Super User 2026 Season 1 on at

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On your tier 2 environment, make sure you have setup the integration user against your SP App Id, under System Admin->Setup->Microsoft Entra ID Applications

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Teevo 405 on at

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Hi Anthony,

Thanks. The Apps already registered in my UAT (Tier-2). The change I need to do is in my Postman setting environment setup to use my UAT client id, secret id and secret value instead.

May I ask help to close this thread, mark Anthony last replied.

Solved. thanks.

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Anthony Blake 3,092 Super User 2026 Season 1 on at

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Great news, thanks for the update.

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