IT Support Services Blog

To completely disable IPv6 on a Windows Server 2008-based computer, follow these steps:

Open Registry Editor.
Locate the following registry subkey:
HKEY_LOCAL_MACHINE\SYSTEM\CurrentControlSet\Services\Tcpip6\Parameters

In the details pane, click New, and then click DWORD (32-bit) Value.
Type DisabledComponents, and then press ENTER.
Double-click DisabledComponents, and then type 0xffffffff in Hexadecimal or 4294967295 in Decimal.Note The 0xffffffff value [...]

Yesterday, while working with one of the SBS 2008 server, after reboot my exchange services were not able to start and was getting stuck in starting mode. Spent lot of time and went through lot of forums and lastly i found that, it was because i disabled IPV6. So folks, if you find your exchange [...]