How-to: Set Trusted Locations in Microsoft Access

Add folders to trusted locations from Office Button ➞ Access Options ➞ Trust Center ➞ Trust Center Settings ➞ Trusted Locations.

The entries are stored in the registry under the following keys (where N is the number of the Trusted Location, starting from 0).

The registry settings can be set on a per-user basis using Group Policy or a registry/reg batch file. You can also set registry keys using VBA within Access, but that will only work if the database is already in a trusted location.

Access 2016/2019: 
[HKEY_CURRENT_USER\Software\Microsoft\Office\16.0\Access\Security\Trusted Locations]
[HKEY_CURRENT_USER\Software\Microsoft\Office\16.0\Access\Security\Trusted Locations\LocationN]

For each trusted folder an entry with following registry keys can be populated:
Path: Path of trusted location, ending with \ (reg_sz)
AllowSubfolders: Determines whether subfolders are trusted as well (0=No; 1=Yes) reg_dword.
Description: Optional text description (reg_sz).
Date: Date of last update.

You should not designate a public folder on a network share as a trusted location, apply appropriate NTFS permissions.

Example

Allow Office 2016/2019 to read \\server64\\foldershare\

Windows Registry Editor Version 5.00
[HKEY_CURRENT_USER\Software\Microsoft\Office\16.0\Access\Security\Trusted Locations]
"AllowNetworkLocations"=dword:00000001
[HKEY_CURRENT_USER\Software\Microsoft\Office\16.0\Access\Security\Trusted Locations\Location31]
"Path"="\\\\server64\\foldershare\\" 
"AllowSubfolders"=dword:00000001

This can be applied with REG:

Set _reg=HKCU\Software\Microsoft\Office\16.0\Access\Security\Trusted Locations
Set _data=00000001
REG ADD "%_reg%" /f /v "AllowNetworkLocations" /t REG_DWORD /d "%_data%" Set _reg=HKCU\Software\Microsoft\Office\16.0\Access\Security\Trusted Locations\Location31
Set _data="\\\\server64\\foldershare\\"
REG ADD "%_reg%" /f /v "Path" /t REG_SZ /d "%_data%"

Related

REG - Add a registry key
REGEDIT - Add a registry file
Compatibility Between the 32-bit and 64-bit Versions of Office 2016 - Microsoft.


 
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