NetDDE Connections Fail When "Logon to" Restrictions Apply (172450)
The information in this article applies to:
- Microsoft Windows NT Workstation 3.5
- Microsoft Windows NT Workstation 3.51
- Microsoft Windows NT Workstation 4.0
- Microsoft Windows NT Server 3.5
- Microsoft Windows NT Server 3.51
- Microsoft Windows NT Server 4.0
This article was previously published under Q172450 SYMPTOMS
You are prompted for a password when connecting to a Windows NT computer
while using a network dynamic data exchange (DDE) application.
CAUSE
"Logon to" restrictions are implemented such that user A can only log on to
workstation A. User B logs on to workstation B, but no "Logon to"
restrictions are placed on this user. A network DDE application is then
started on both workstations. When workstation A attempts to dial
workstation B through the network DDE application, User A is prompted for a
password. If any valid non-administrative user and password is used, the
connection fails with an "Invalid Password" pop-up error message.
When the network DDE client connects to the network DDE server, the server
will impersonate the client. Because of this security restriction, the
server portion of the network DDE application is responding with the
password dialog box.
RESOLUTION
Remove "Logon To" account restrictions for the user account that originates
the connection.
-or-
Add netdde to the list of workstations the user can log on from.
-or-
From the originating computer, perform the following steps:
- Use the Domain Administrator's account.
- Use the answering computer's Administrator account.
- Enable the domain Guest account and use it to originate the
connection.
STATUS
Microsoft has confirmed this to be a problem in Microsoft Windows NT
versions 3.51 and 4.0. We are researching this problem and will post new
information here in the Microsoft Knowledge Base as it becomes available.
| Modification Type: | Major | Last Reviewed: | 5/13/2003 |
|---|
| Keywords: | KB172450 |
|---|
|