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Dynamics 365 Community / Forums / Microsoft Dynamics CRM (Archived) / CRM 2016 On Prem - Aut...
Microsoft Dynamics CRM (Archived)

CRM 2016 On Prem - Authentication for Web API - 401 Unauthorized

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Posted on by Community Member Microsoft Employee

We have a 2016 on-premise that is not configured for IFD.  The development team is attempting to build applications that can utilize the Web API however they are unsuccessful when trying to authenticate.  

CRM 2016 On-Premise

Not configured for IFD

URL Redirects

ADFS claims authentication (forms is not enabled)

I have looked online for documentation about how to connect but I have not found definitive answers.  In the given setup above, what is the method to authenticate?

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  • Community Member Profile Picture
    Community Member Microsoft Employee on at
    RE: CRM 2016 On Prem - Authentication for Web API - 401 Unauthorized

    AuthenticationContext authContext = new AuthenticationContext(_authority, false);

    UserCredential credentials = new UserCredential(_username, _password);

    _authResult = authContext.AcquireToken(_serviceUrl, _clientId, credentials);

  • Inogic Profile Picture
    Inogic 402 on at
    RE: CRM 2016 On Prem - Authentication for Web API - 401 Unauthorized

    Hi EWatson,

    What piece of code or line of code caused the above said issue?
    If in case, you could paste your code snippet, it would help me to narrow down the cause.

    Thanks!
    Sam

  • Community Member Profile Picture
    Community Member Microsoft Employee on at
    RE: CRM 2016 On Prem - Authentication for Web API - 401 Unauthorized

    We have attempted to connect (we saw the link you shared) and we are getting {"This method overload is not supported by '_sts1.ourcompany.com/.../&;"}

  • Inogic Profile Picture
    Inogic 402 on at
    RE: CRM 2016 On Prem - Authentication for Web API - 401 Unauthorized

    Hi,

    Try checking the below link, might prove useful to.
    http://www.inogic.com/blog/2016/03/programming-using-webapi-through-c-in-dynamics-crm-2016/ 

    HTH!

    Thanks,

    Sam

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