In my windows domain, there's been happening a problem with the access to some of our shared folders: There appears a "the account is disabled" problem whe trying to access those.

When looking at the the Active Directory Groups and Users snap-in, there's no user blocked nor disabled and the users trying to access the shared folders don't have any problem logging in on their respective computers. Needless to say, they have proper permissions on the network shares to be accessed.

What might be the problem?