OL2000: "No Default Mail Client" Error Message Appears When You Try to Add Users to a Network Share (292016)

SYMPTOMS

After you create a network share that has user-level access control, when you click Add in the Add Users dialog box to select users for the share, you may receive the following error message:

Either there is no default mail client or the current mail client cannot fulfill the messaging request. Please run Microsoft Outlook and set it as the default mail client.

You may or may not also receive a second error message:

You cannot view the list of users at this time. Please try again.

This issue may affect users who are running Outlook 98 or Outlook 2000 on a Microsoft Windows 95- or Windows 98-based computer.

RESOLUTION

To resolve this behavior, perform the following procedures:

Procedure 1

Make sure that Outlook is the default mail client:

On the Start menu, point to Settings, click Control Panel, and then double-click Internet Options.
Click the Programs tab.
To specify Outlook as the default e-mail client, click Outlook in the drop-down list.
Click OK, and then try again to create the network share.

Procedure 2

Use share-level, not user-level, access control:

On the desktop, right-click Network Neighborhood, and then click Properties.
Click Access Control, click Share-level access control, click OK, and then try again to create the network share.

Procedure 3

Paste a new copy of Mapi32.dll into the Windows\System folder:

Click Start on the taskbar, point to Search, and then click For Files or Folders.
In the Search for files or folders named box, type Mapi32.dll, and then click Search Now.
Right-click the file that appears, and then click Rename.
Type a new name for the file, and then press ENTER.
Extract the Mapi32.dll file from your Windows 95 or Windows 98 media, paste the file into the Windows\System folder, and then try again to create the network share.

MORE INFORMATION

The user interface for sharing uses the Messaging Application Programming Interface (MAPI) address book. When you attempt to add users to a share, calls are made to the Mapi32.dll file in the Windows\System folder.

For additional information about the second error message, click the article number below to view the article in the Microsoft Knowledge Base:

177607 Err Msg: You Cannot View the List of Users at This Time

For additional information about using the Extract tool and the System File Checker tool, click the article number below to view the article in the Microsoft Knowledge Base:

129605 How to Extract Original Compressed Windows Files

If you try to run a program that requires a special version of Mapi32.dll, that program may not function correctly. Consult the program's vendor for an updated version of the file or for additional suggestions.