Assuming tat you don't actually want to use an LDAP service and want to
remove it from your profile go to;
Control Panel-> Mail-> button E-mail Accounts select the 4th option-> Next
and remove the LDAP service
The four options are "Add a new e-mail account", "View or change existing
e-mail accounts", "Add a new directory or address book", and "View or change
existing directories or address books": What do you see?
I was looking at the 3 options once I double-click Mail under the Control
Panel, but your right, I do see the 4 options when I click the Email
accounts.