MS Access - Unknown publisher

Posted on 2007-10-01
Last Modified: 2011-07-18
I am using Windows XP SP2 professional. I am trying to open an Access file(mdb) from a network share, it prompts me error message, " Unknown Publisher", On pressing open button, it prompts "Microsoft Access can not open this file" This file located outside your intranet or on an untrusted site. Microsoft Access will not opne the file due to potential security problems. To open the file, copy it to your machine or an accessible network location.
Question by:Hewitt_GGN_ITS
    LVL 22

    Accepted Solution


    Start > Run > gpedit.msc. Go to User Configuration > Administrative Templates > Windows Configuration > Attachment Manager. Enable the option "Inclusion list for low file types". Then add the .mdb file extension to the list.

    LVL 22

    Expert Comment

    You have to right-click on the file, view the
    properties, and press the [Unblock] button in the lower right.  Then the
    file will work.
    LVL 22

    Expert Comment

    Hewitt_GGN_ITS, any update?

    Author Comment

    Your first solution seems to be the most appropriate in our case. Will share my findings soon with you. Additionaly, I have added the destination server(FQDN) under trusted site in Internet Explorer. Seems to resolve the issue. I will share if find something else on tthis...Thanks for your help, followup and attention to this issue.
    Thank You.
    LVL 1

    Expert Comment

    Forced accept.

    EE Admin

    Expert Comment

    I ran into the same issue after running Windows Update on 7/18/2011 there were 14 updates. I could not determine which one caused the issue but this solution is a great work around

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