System Error 1240 Has Occurred

Contents

Attempting to mount a client to an SMB network share and you can receive the message:

Info

System Error 1240 Has Occurred. The Account is Not Authorized to Login from This Station.

Symptom

When connecting to a network share and the share name is incorrect, you will receive a very confusing error message.

net use x: \ServerXYZ
System error 1240 has occurred.
The account is not authorized to log in from this station.

Selecting the correct share name (XYZ1 instead of XYZ) resolves this.

net use x: \ServerXYZ1
The command completed successfully.

The error message caused by selecting a non-existing share makes this error message confusing.