Microsoft Access – Trusted Locations

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 2007: 
[HKEY_CURRENT_USER\Software\Microsoft\Office\12.0\Access\Security\Trusted Locations]
[HKEY_CURRENT_USER\Software\Microsoft\Office\12.0\Access\Security\Trusted Locations\LocationN] 
Access 2010: 
[HKEY_CURRENT_USER\Software\Microsoft\Office\14.0\Access\Security\Trusted Locations]
[HKEY_CURRENT_USER\Software\Microsoft\Office\14.0\Access\Security\Trusted Locations\LocationN] 
Access 2013: 
[HKEY_CURRENT_USER\Software\Microsoft\Office\15.0\Access\Security\Trusted Locations]
[HKEY_CURRENT_USER\Software\Microsoft\Office\15.0\Access\Security\Trusted Locations\LocationN] 

For each trusted folder an entry with following registry keys may 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 (2010)

Windows Registry Editor Version 5.00
[HKEY_CURRENT_USER\Software\Microsoft\Office\14.0\Access\Security\Trusted Locations]
"AllowNetworkLocations"=dword:00000001
[HKEY_CURRENT_USER\Software\Microsoft\Office\14.0\Access\Security\Trusted Locations\Location0]
"Path"="\\\\server64\\foldershare\\" 
"AllowSubfolders"=dword:00000001

Related

REG - Add a registry key
REGEDIT - Add a registry file
Compatibility Between the 32-bit and 64-bit Versions of Office 2010 - MSDN


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