Article ID: 175641
Article Last Modified on 1/22/2007
APPLIES TO
- Microsoft Windows NT Workstation 4.0 Developer Edition
- Microsoft Windows NT Server 4.0 Standard Edition
- Microsoft Windows for Workgroups 3.2
- Microsoft Windows 95
- Microsoft Exchange Server 4.0 Standard Edition
- Microsoft Exchange Server 5.0 Standard Edition
- Microsoft Exchange Server 5.5 Standard Edition
- Microsoft Exchange Windows NT client
- Microsoft Outlook 97 Standard Edition, when used with:
- Microsoft Windows 95
- Microsoft Windows 98 Standard Edition
- Microsoft Windows 98 Second Edition
This article was previously published under Q175641
SYMPTOMS
When you try to connect to down-level clients on a computer running Windows for Workgroups and Windows 95, you may receive the error message:
-or-
This message appears when you connect to a Windows 95 computer that has been set up to use User Level Access Control and when you connect to a share that has a password (Read or Full Control) set on it.
Setting LMCompatibilityLevel to 2 prevents a Microsoft Exchange Server 4.0 and 5.0 client from gaining access to a Microsoft Exchange Server versions 4.0 and 5.0 from the Inbox with one of the following error messages:
-or-
CAUSE
If LMCompatibilityLevel is set to 2, Windows NT will never send a LANMAN challenge/response, and Windows NT will be unable to connect to clients that require it.
MORE INFORMATION
To increase password security, Windows NT 4.0 allows you to restrict the sending of LANMAN challenge/response passwords over the network. This may, however, make Windows NT unable to connect to down-level clients and Exchange 4.0 and 5.0 clients.
For additional information on preventing the sending of LANMAN passwords, click the article number below to view the article in the Microsoft Knowledge Base:
147706 How to Disable LM Authentication on Windows NT
RESOLUTION
To resolve this problem, obtain the latest service pack for Windows NT 4.0 or Windows NT Server 4.0, Terminal Server Edition. For additional information, click the following article number to view the article in the Microsoft Knowledge Base:
152734 How to Obtain the Latest Windows NT 4.0 Service Pack
Additional query words: wfw inbox win95
Keywords: kbbug kbfix KB175641