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Dynamics 365 Community / Forums / Microsoft Dynamics NAV (Archived) / Cannot connect with MS...
Microsoft Dynamics NAV (Archived)

Cannot connect with MS Dynamics CRM

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Posted on by MateuszKILINSKI 172

Hello. I am trying to integrate my Dynamics NAV 2017 with MS Dynamics 365 CRM. I have two versions of CRM - productive (ver. 8.2) and for development (ver. 9.0). 

There are two cases.

1. Trying to integrate with development version - when I type the Dynamics CRM URL of dev version, I have an error: The system is unable to connector to Microsoft Dynamics CRM. Description: Unable to Login to Dynamics CRM.

2. When I type the URL of my productive version (8.2), the connection is established and works well.

I don't know what can be wrong. I don't know, should I turn on some function in Dynamics 365 DEV CRM? I am doing this kind of integration first time in my life, so please - be forgiving :)  

*This post is locked for comments

  • Suggested answer
    Nishant Rana Profile Picture
    Nishant Rana 11,320 Microsoft Employee on at
    RE: Cannot connect with MS Dynamics CRM

    We were also getting the same error - this helped

    nishantrana.me/.../

  • Iron Felix Profile Picture
    Iron Felix 80 on at
    RE: Cannot connect with MS Dynamics CRM

    Hi,

    This problem because of the change of security protocol for ver. 9(you development)

    Microsoft announced the following:

    The security protocol for CRM Online services has been updated to TLS 1.2. This breaking change for integration products is implemented on CLR 4.6.1 and earlier versions. If the system has been affected by this change, it will experience failed connection requests (with no further diagnostics) from the Dynamics NAV application to CRM

    Microsoft Dynamics NAV has announced a hotfix, please study the following posts:

    https://support.microsoft.com/en-us/help/4075042/failed-connection-requests-from-microsoft-dynamics-nav-2016-and-2017

    https://blogs.msdn.microsoft.com/nav/2018/01/23/connecting-dynamics-nav-2016-2017-dynamics-365-for-sales-version-9/

    community.dynamics.com/.../282609

  • Verified answer
    MateuszKILINSKI Profile Picture
    MateuszKILINSKI 172 on at
    RE: Cannot connect with MS Dynamics CRM

    The problem is solved - I had a wrong NAV Version. Reinstall to 10.0.20019 soldved my issue.

  • MateuszKILINSKI Profile Picture
    MateuszKILINSKI 172 on at
    RE: Cannot connect with MS Dynamics CRM

    Yes, I have two users and I am absolutely sure that the credentials are good.

  • Suggested answer
    Stefano Demiliani Profile Picture
    Stefano Demiliani 37,162 Most Valuable Professional on at
    RE: Cannot connect with MS Dynamics CRM

    Are you using the correct credentials for connecting to the DEV CRM system?

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