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WIndows SBS 2011 DC Crash, Trying to Recereate on Current Domain

Posted on 2016-10-03
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Last Modified: 2016-10-05
Inherited a system as described above, windows 201DC in current domain has all domain info
tried repairing 2011 DC but HDD gone
No backups for SBS 2011
new HDD and trying to setup SBS 2011 with same server name ip address etc
any way to promote current DC windows 2012 system and reintroduce SBS 2011 server?
can I recreate the server offline and reintroduce it to the domain? trying to get systems up so we can blow out all current domain info and recreate from scratch
trouble is they have a dynamics 2011 crm server running on the domain and it works now but getting many network errors trying to establish active directory communication
looking for recommendations and suggestions
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Question by:David Elebute
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Accepted Solution

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Lee W, MVP earned 500 total points
ID: 41827416
Your question isn't quite clear to me...

Is your 2012 system a DC with the Active Directory that the SBS 2011 system USED to have?  If so, you want to re-install SBS in Migration mode AFTER you run DCDIAG /C /E /V and clean up all the unexpected errors and AFTER you delete the old SBS server from AD (delete it like you would any failed DC).
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Author Comment

by:David Elebute
ID: 41827784
sorry Lee, yes the 2012 system is a DC with the Active Directory that the SBS 2011 server used to have.
so run the dcdiag /c /e /v from the 2012 server right? its been a while since I have done a migration. after the dcdiag then just delete the old server name object from AD and reinstall SBS 2011 with new name and run the migration?
am I missing any steps?
thanks again for the help!
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Author Comment

by:David Elebute
ID: 41827898
ran the devicediag on the 2012 server
it said the domain passed test Intersite, but of course getting errors looking for the PDC (SBS 2011) server
installing fresh SBS 2011 now
going to use migration choice when prompted
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Assisted Solution

by:Lee W, MVP
Lee W, MVP earned 500 total points
ID: 41828067
REPEAT - you MUST fix AD first - correct the issues DCDIAG finds - seize the roles if you must and remove the SBS system as if it were a Failed DC.  Once you have AD cleaned up, THEN install SBS in migration mode.
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Author Comment

by:David Elebute
ID: 41828144
Got it Lee W
all my errors are when trying to find failed PDC with dcdiag
working on the cleaning up AD
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LVL 95

Assisted Solution

by:Lee W, MVP
Lee W, MVP earned 500 total points
ID: 41828156
Get rid of the failed DC.  In 2012 deleting a failed DC is largely automated when you delete it from the Domain Controller's OU, still, I would step through the manual steps, including inspecting DNS and removing it from there to ensure everything is clear.
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Author Comment

by:David Elebute
ID: 41828174
thank again Lee W
working on doing exactly that
manually removing the failed DC from AD structure and removing the failed DC from DNS server
all these are now running on 2012 DC
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Author Comment

by:David Elebute
ID: 41828379
I removed the entries for failed DC out of DNS
cannot remove the failed DC from domain
dc promo on 2012 server via server manager cannot find failed DC to remove
from inside AD Users and Computers, tried deleting failed DC but keep getting access denied but now the failed DC still shows under domain controllers but does not have the GC type designation anymore
2012 DC now shows as operations master, shows as PDC and operations master
moved failed DC out of domain controllers just to computers, but still cannot delete it.
what did I miss?
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Author Comment

by:David Elebute
ID: 41828443
hello there Lee W
just completed dcdiag on 2012 after reboot and it came back with no errors in DNS, passed all DNS tests
no errors with the rest passed FsmoCheck
I would like to add another server now but not necessarily SBS 2012, would rather put another 2012 box in here to backup the current 2012 DC
exchange not in use or sharepoint on failed SBS DC
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Expert Comment

by:Lee W, MVP
ID: 41829778
Then you just install a second DC.  Migration mode is for SBS and Essentials systems since they are required to hold the FSMO roles.  Standard servers just add a DC.
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