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Dynamics 365 Community / Forums / Microsoft Dynamics NAV (Archived) / Could not load file or...
Microsoft Dynamics NAV (Archived)

Could not load file or assembly Microsoft.Office.Interop.Outlook

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Posted on by Community Member

When trying to send an invoice using Outlook, the following message is thrown:

A call to Microsoft.Dynamics.Nav.Integration.Office.Outlook.IOutlookMessage.CanInitializeOutlook failed with the message: Could not load file or assembly Microsoft.Office.Interop.Outlook, Version=15.0.0.0, Culture=neutral, PublicKeyToken=71e9bce111e9429c of one of its dependencies. Access denied.

When running NAV as admin, the error is not thrown and the invoice can be sent without issues.

We are using Dynamics NAV 2017 (10.0.16177)

What could be the issue?

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I have the same question (0)
  • helpdesk@microsi.com Profile Picture
    helpdesk@microsi.com 5 on at

    I am experiencing the same thing.  Do not have an answer yet but have seen that if you open Outlook and NAV as 'Run As Administrator' that is a viable workaround. Hope this helps short-term. 

  • Community Member Profile Picture
    Community Member on at

    In my case, Outlook does not have to be running as administrator, only NAV.

  • Suggested answer
    Community Member Profile Picture
    Community Member on at

    I was able to fix the issue by analyzing the fusion logs.

    The issue was not with the dll in the error message, but with the dll called office.

    "C:\Windows\assembly\GAC_MSIL\office\15.0.0.0__71e9bce111e9429c\office.dll"

    When adding the user under security of this file, the issue was resolved.

  • IT Wine Guy Profile Picture
    IT Wine Guy 5 on at

    I'm seeing this in my environment as well, but the users in question are already added to that .dll file mentioned. We're on NAV 2016 9.0.44974.0, and using Outlook 2016 64 bit (16.0.12130.20272). Only a few of my users are affected, and it seems random. It'll work for a couple of days for them and then suddenly stop working for an entire day. 

  • Henkvv Profile Picture
    Henkvv 5 on at

    Anyone found another solution?

    I've the same issue, only one user (but not everybody uses this function).

    Adding security access to the office.dll file did not work.

    Added also to the file in the Microsoft Dynamics NAV\90\office.dll file.

    We use Nav2016 and Office 2010.

  • Ghetz Profile Picture
    Ghetz 3,013 on at

    Same problem in NAV 2018. Happens often when trying to send PO by email

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