Open up a command prompt, and then type in the following:

net use

This will give you a list of the connected drives, including the ones that aren’t actually mapped to a drive letter. To disconnect one of the connections, you can use the following command:

net use /delete \\server\sharename

If you wanted to actually connect to a share without mapping a drive letter, you can do the following:

net use /user:Username \\server\sharename Password