The user has exceeded the dial-in lockout count.

Details
Product: Windows Operating System
Event ID: 1040
Source: IAS
Version: 5.0
Symbolic Name: IASP_DIALIN_LOCKED_OUT
Message: The user has exceeded the dial-in lockout count.
   
Explanation

The account lockout feature specifies how many times a remote access authentication fails against a valid user account before the user is denied access.If the remote access server is configured for RADIUS authentication and Internet Authentication Service (IAS) is being used, the registry must be modified on the IAS server computer.
Note: The remote access account lockout is not related to the Account locked out setting on the Account tab on the properties of a user account.

   
User Action

To manually reset a user account that has been locked out before the failed attempts counter is automatically reset, delete the following registry subkey that corresponds to the user’s account name:

HKEY_LOCAL_MACHINE\SYSTEM\CurrentControlSet\Services\RemoteAccess\Parameters\AccountLockout\domain name:user name

To increase the maximum number of attempts before account lockout occurs, reset the MaxDenials value entry in the following registry subkey:

HKEY_LOCAL_MACHINE\SYSTEM\CurrentControlSet\Services\RemoteAccess\Parameters\AccountLockout

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