I have a a network set up with Windows Server 2012 and about 35 users all on Windows 7 Professional. I recently added some shares to a set of pre-existing shares. After doing this each client began began losing their connection to the 2012 file server and the connection for the shares is lost. After the connection to the share drops it will come back within 2 or 3 minutes. This happens on a regular basis (every one hour) throughout the day. The error message ID in Event Viewer on the file server is 30623.