Dynamics NAV 2017 Office.dll is being randomly deleted on some user's machines

To email out of Dynamics NAV 2017, the Office dll is located in the folder: c:\Windows\assembly\GAC_MSIL\office\ The Office dll is the only file in the folder.

In the last few days, for some, but not all users, the entire folder is being deleted along with the Office dll, of course. Users are unable to email out of Outlook until someone manually recreates the folder and copies the Office dll into it. Within the last week, this has happened twice to some of our users and once for others, while most remain unaffected.

Does anyone have any ideas about what could be causing this odd behavior?


  • RemkoDRemkoD Member Posts: 100
    Register the exact time and machine when the incident occurs and investigate if around that time any Windows-Updates or MS Office (2013) application changes have been done.
  • krikikriki Member, Moderator Posts: 8,932
    [Topic moved from 'NAV/Navision Classic Client' forum to 'NAV Three Tier' forum]

    Regards,Alain Krikilion
    No PM,please use the forum. || May the <SOLVED>-attribute be in your title!
    NAV TechDays 2020: 19 & 20 November 2020, Antwerp (Belgium)
  • j2associatesj2associates Member Posts: 4
    Doing a repair of MS Office fixed the issue.
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