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Dynamics 365 Community / Forums / Customer experience | Sales, Customer Insights,... / MS Outlook 2016 Client...
Customer experience | Sales, Customer Insights,...
Suggested Answer

MS Outlook 2016 Client - The caller was not authenticated by the service

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Posted on by Kahspot 161

Hello,

Dynamics 365 On -premise

MS Outlook 2016 

Using VPN.

I am setting up MS Outlook and Dynamics 365 integration and when I try to connect  to an organization I get the following error:

Any ideas what is going on and how to resolve this issue?  Thanks.

pastedimage1614303547566v2.png

I have the same question (0)
  • Suggested answer
    kunihih Profile Picture
    kunihih on at

    Is your user account in the same domain as the Dynamics Server? Based on the error you may be running into the following limitation.

    Troubleshooting and things to know about Microsoft Dynamics 365 for Outlook | Microsoft Docs

  • Kahspot Profile Picture
    Kahspot 161 on at

    Hello Kunihiko,

    Sorry , forgot to mention.

    I'm using VPN.

    Thanks

  • Suggested answer
    kunihih Profile Picture
    kunihih on at

    Try opening the ports as described in the following page

    Ports to be opened for configuring CRM Outlook Client over VPN | Microsoft Docs

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