Can't access shared drives from within Notes 9.0

I’ve searched the forums, but I can’t find anyone else having this problem, so please help with any advice.

IBM Domino is at R9.0.1, and IBM Notes clients are at the same version.

Users have new Windows 8.1 desktops and laptops.

Installs ran beautifully - no errors or warnings.

However, when an IBM Notes 9 user opens their mail file (or any other databases), selects New email (or new document) and attempts to attach a file from the file server, none of the drive mappings are listed???

All the user sees is his or her C:\ drive.

From within Windows Explorer, all of the drive mappings (we have an H:\ home directory set up for each user as well as an S:\ drive accessible by all Windows domain users) are available and online.

But from within Notes 9.0.1, only files on the user’s hard drive can be attached to a memo - it doesn’t offer (doesn’t list the H:\ or S:\ drives) any files listed on shared drive mappings?

Please help!

Thank you.

Subject: Win 10 but may be relevant

When I bring up an attach dialog, if I use the dropdown, I don’t see all of my mapped drives (different from what you describe but I’m still missing valid mapped drives).

If I click on 'Computer, I see all of my mapped drives…

Subject: Mapped Network Drives are not visible

Here’s the solution we are using…

Symptoms
Mapped network drives are not visible when creating attachments from Lotus Notes on Windows 7, 8, 10 when the User Account Control (UAC) is enabled.

Cause
This problem occurs because UAC treats members of the Administrators group as standard users.
Therefore, network shares that are mapped by logon scripts are shared with the standard user access token instead of with the full administrator access token.

Solution
Configure the EnableLinkedConnections registry value, which allows Windows to share network connections between the filtered access token and the full administrator access token for a member of the Administrators group.

To configure the EnableLinkedConnections registry value, follow these steps:

  1. In Registry Editor, locate and then click the following registry subkey: HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\Windows\CurrentVersion\Policies\System
  2. Right-click Configuration, click New, and then click DWORD (32-bit) Value.
  3. Name the new registry entry as EnableLinkedConnections.
  4. Double-click the EnableLinkedConnections registry entry.
  5. In the Edit DWORD Value dialog box, type 1 in the Value data field, and then click OK.
  6. Exit Registry Editor, and then restart the computer.

Microsoft Support Documentation:
Mapped drives are not available - Windows Client | Microsoft Learn https://support.microsoft.com/en-ca/help/3035277/mapped-drives-are-not-available-from-an-elevated-prompt-when-uac-is-co