Hello all, We have have a total of 30 plus users connected to our network via a member domain controller. The local domain controller is a Dell PowerEdge T610 running Windows 2008 R2 the latest drivers and firmware. The DC instance is running via a Hyper-V guest. The DC is also running DHCP and DNS. The site is one of 8 jobsites we have connected via VPN. Of the 30 users six are running Windows 7 x64, the issue they're having is random connection drops thoughout the day. The timing of the drops is sporadic across these six users, but when it occurs Outlook 2007 will show offline and/or password needed, the network drives will show an X through them and attempts to save open files will say the network is not available. A moment later, all will be fine again and a close re-open of Outlook re-establishes the Outlook/Exchange connection. I have turned off power management on the NIC, checked drivers, ensured all power management features on the desktops are OFF, plus disabled IPv6. The users are all connected directly to the Dell switch and the Windows XP users in the same location are not having any of these issues. I'm running out of possibilities to resolve the issue, any thoughts or suggestions? Thank you.

Hi, Thanks for posting in Microsoft TechNet Forum. Please check if there are any clues in Event Viewer. Meanwhile, please refer to the following article to check to see if it could help you: Mapped Drive Connection to Network Share May Be Lost If this issue persists, I suggest you create a registry value to check the result: To configure the EnableLinkedConnections registry value, follow these steps: 1. Click Start, type regedit in the Start Search box, and then press ENTER. 2. Locate and then right-click the following registry subkey: HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\Windows\CurrentVersion\Policies\System 3. Point to New, and then click DWORD Value. 4. Type EnableLinkedConnections, and then press ENTER. 5. Right-click EnableLinkedConnections, and then click Modify. 6. In the Value data box, type 1, and then click OK. 7. Exit Registry Editor, and then restart the computer. Hope it helps. Alex Zhao TechNet Subscriber Support in forum. If you have any feedback on our support, please contact tngfb@microsoft.comPlease remember to click Mark as Answer on the post that helps you, and to click Unmark as Answer if a marked post does not actually answer your question. This can be beneficial to other community members reading the thread.

Hi, I am just writing to check the status of this thread. Was the information that I provided in my previous reply helpful to you? Do you have any further questions or concerns? Please feel free to let us know. If you could update us at your earliest convenience that would be wonderful. Have a good day! Alex Zhao TechNet Subscriber Support in forum. If you have any feedback on our support, please contact tngfb@microsoft.comPlease remember to click Mark as Answer on the post that helps you, and to click Unmark as Answer if a marked post does not actually answer your question. This can be beneficial to other community members reading the thread.

Hi, As this thread has been quiet for a while, we assume that the issue has been resolved. At this time, we will mark it as ‘Answered’ as the previous steps should be helpful for many similar scenarios. If the issue still persists, please feel free to reply this post directly so we will be notified to follow it up. You can also choose to unmark the answer as you wish. BTW, we’d love to hear your feedback about the solution. By sharing your experience you can help other community members facing similar problems. Thanks for your understanding and efforts. Alex Zhao TechNet Subscriber Support in forum. If you have any feedback on our support, please contact tngfb@microsoft.comPlease remember to click Mark as Answer on the post that helps you, and to click Unmark as Answer if a marked post does not actually answer your question. This can be beneficial to other community members reading the thread.