Disabled IPV6 - Windows Server 2008 R2 / Exchange 2010 Server Stuck "Applying Computer Settings"

I have a server (Windows Server 2008 R2 Domain Controller with Exchange 2010 Installed) that was being worked on where a tech disabled IPV6 (unchecked the box) and rebooted. When it comes back up, it hangs on "Applying Computer Settings" and won't go any further. Booting to safe mode (of any kind) won't allow login as it is the only domain controller.

I have read that IPV6 should never be disabled this way, but this is the first experience I've had with it already having been done and causing issues. How can I get it re-enabled on this server? I can't RDP to it but it does respond to pings and seems to be handing out IP addresses (via DHCP), responding to DNS requests, etc. Exchange won't come up and login screen never appears.
street9009IT Project ManagerAsked:
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is it a Virtual server or Physical server?
Amit KumarCommented:
Boot computer in DSRM mode and enable it but this can be done by physical presence or ILO. You may have to put IP as well if IPv6 has been used for communication.

FYI, never built a Domain controller as Exchange server as well this is not Microsoft supported.
street9009IT Project ManagerAuthor Commented:
Gaurav - it is a physical server.

Amit - Can you provide a little more detail? FYI- It's not a setup I performed but am stuck with supporting it. I would never set it up this way.
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if its a physical server then you should be login to the server physically or should have iLO access to access the console of the server.

I would not recomment to go with DSRM mode.

Also MS dont recomment to have AD and Exchange installed on the same server
Amit KumarCommented:
Gaurav even I dont recommend DSRM but this is the last option.

Take ILO or any other medium where you can connect physical server and reboot on demand, then press F8 on boot up so it will show the option to run as safe mode and other options

use Directory Service Restore Mode, but one more glitch here you must know the password of DSRM administrator. if not then it is very big problem.
street9009IT Project ManagerAuthor Commented:
Gaurav - The server will not come back up to a console. I cannot connect to it via RDP. I don't know how else to access it. Again, I did not set this server up, just supporting it.

Amit - I'm not entirely sure we even have DSRM password either. Only password I have is the domain administrator. It may be the same, but not sure?

All I really need to do is re-enable IPV6 and reboot it. There has to be an easy way to do that via command line or other means, right?
Amit KumarCommented:
do one more thing, if possible get network cable disconnected from DC and then reboot it. so apply computer settings will not stuck as it is trying to get settings from network. and your DC is not giving any AD service.

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street9009IT Project ManagerAuthor Commented:
It FINALLY came up and I was able to RDP to it. Re-checking the box fixed the problem and it boots right up. Damage undone thankfully.

I'm closing the question and splitting points.
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Windows Server 2008

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