OAuth 2.0 getting access token issue on postman

[Sreedhar M]

I'm trying to generate the access/refresh tokens using postman.

I have given Get method and provided the instance url as https://xxxxxx.service-now.com/oauth_token.do and under headers section, provided all the required key value pairs, like client id, secret, username, password and grant type.

And when I hit Send button , getting the below error,

{

   "error_description": "access_denied",

   "error": "server_error"

}

please help me to get the tokens.

[EvgeniyG]

Hey @Sreedhar M , I have the same issue and I follow this thread.
Which authentication do you use? Base auth? Can you show? 
I have the same problem with admin user.
Thank you @Ankur Bawiskar  for explanations!

[Sandesh9]

Hi @Ankur Bawiskar 

I have followed the exact steps but unable to generate access token and refresh token. I am getting the following error,

{

    "error_description": "access_denied",

    "error": "server_error"

}

to add context to this, we have a multi sso enabled environment and i found this article,

https://support.servicenow.com/kb?id=kb_article_view&sysparm_article=KB1286112

This article says oauth authentication might not work and advices to disable the following which i did but wasnt still able to generate a token,

Allow Non Local Login Users # https://XXXXX.service-now.com/nav_to.do?uri=sys_authentication_policy.do? sys_id=2f024f70730220103a5b0dd43cf6a70a

Can you guide/advice if i am missing anything?

TIA for your response.

Sandesh

[Abbas_5]

Hello @Sreedhar M,

For a similar kind of issue, please refer to the link below:
https://www.servicenow.com/community/developer-forum/oauth-2-0-getting-access-token-issue-on-postman...

If it is helpful, please hit the thumbs up button and accept the correct solution in future by referring to this solution; it will be helpful to them.

Thanks & Regards,

Abbas Shaik