When elevating an application using Application Manager's User Rights Management (URM) feature, File Open/Save dialogs of elevated applications may show network drives as disconnected, whilst they appear connected with explorer.exe.
This issue is due to the way User Account Control (UAC) creates two separate access tokens, each with associated with their own underlying logon session (LUID).
This behaviour is covered within Microsoft UAC Documentation:
As per the above article, an optional security policy can be configured to allow both access tokens to access the same mappings:
Registry Key: HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\Windows\CurrentVersion\Policies\System
Value Name: EnableLinkedConnections
Value Type: REG_DWORD
Value Data: 1