We recently demoted and decommissioned a Windows Small Business Server 2003 box that was previously an Exchange and PDC. We now have three Windows Server 2008 R2 VMs as domain controllers and have raised our forest/domain functional levels to Windows Server 2008 R2. After turning off the SBS 2003 server, we received complaints of network slowness (opening files, browsing). Powering on the SBS 2003 server resolved the issue, so there must be something still pointing to it. So far we have done the following to no avail:
* Updated the folder redirection group policy to point to the new file server and unchecked the option to "move contents of documents to the new location"
* Disabled DNS and WINS services on the SBS 2003
* Ensured all devices are using active domain controllers for DNS
* Disabled offline files
* Ensured client devices do not have any network drives or printers mapped to the old server
* Checked the "ShellFolders" registry key under HKCU and HKLM, and nothing is pointing to the old server
Despite the above, it appears some clients are still pointing to the old server for some reason:
* Under Computer Management -> Shared Folders -> Sessions, I see a couple client PCs that are connected to the server for "Windows" type sessions. However, there is nothing listed as open under Shared Folders -> Open Files. Most of the "Windows" type sessions only stay open for a few seconds every so often.
* If I use TCPView from Sysinternals, I see a few clients connected under the "microsoft-ds" Local Port. I logged in to one such client and didn't see any open applications, nor were there any network drives or printers pointing to the old server. Most of these "microsoft-ds" sessions only stay open for a few seconds periodically and then close.
Any help is greatly appreciated. Thanks in advance!