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Domain is not available

By Lost_one ·
I am having a major problem.

I have 2 DC. One PDC and one BDC. I have Active Directory replicating to the BDC from the PDC (before I installed the BDC the PDC was the only DC). All was running well until the other day the BDC crashed. Now when people logon the get the message "The system cannot log you on now because the domain <domain name> is not available". When people try and browse the network the get the message "There are currently no logon servers available to service the logon request". I have checked DNS and it seems to be working fine. I can ping the DNS server without a problem. It seem like all the computers were logging on to the BDC. Now that the BDC is down no one can log on, even with the PDC having all the same info.

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by allthegoodnamesweregone In reply to Domain is not available

i'm going to look into this a little bit for you but wanted to give you a fyi first, just in case it gets you looking in the right direction.

if you're running active directory, you don't have PDCs and BDCs. you DO have a PDC emulator but the structure is much different than it is in a NT domain.

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by Lost_one In reply to

Poster rated this answer.

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by BFilmFan In reply to Domain is not available

Which version of Windows Server is this?

Are both these DC's in the same location? Are both DC's in the same AD site?

If you have one or more AD sites, you may have an issue where clients cannot locate a domain controller to login.

Are you sure that all the Operations Masters roles are being handled by the remaining domain controller?

If no one can login, your PDC Emulator is down and you must seize the roles at the remaining domain controller.

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by BFilmFan In reply to

Good catch on the GC part CG. Send my points to CG. I think he is right.

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by Lost_one In reply to

Close, see above

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by CG IT In reply to Domain is not available

the global catalog role is required for user logon as well as the sysvol folder and netlogon shares. Normally, the first DC created in the forest has all roles [including the global catalog role].it creates the sysvol and netlogon share folders. Adding other DCs to the network for redundancy doesn't automatically create the global catalog role on them. The role must be assigned to the DC. here's a link: http://support.microsoft.com/default.aspx?scid=kb;en-us;295419

in TCP/IP properties, if you have more than 1 DNS server which can supply clients with resource records of services available, they must be listed for clients to find the resources such as DCs to authenticate with. If the second DC had the global catalog role assigned to it and the first DC does not have it [the role removed] users will not be able to log on.

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by Lost_one In reply to

Close, see above

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by birojit.nath In reply to Domain is not available

I could not Get you,In Active Directory there is no need for the BDC And PDC.
Assuming that you have to DC And ADC. Remove the Crashed ADC and let it replicate. Prepare a new ADC and add the machine to domain. Do the DC Promo to replicate the active directory. Once done your ADC Is ready.
CAn you tell me if you have enabled the global Catalague server

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by Lost_one In reply to

Poster rated this answer.
The domain can not be contact so I can not add another computer/server to it.

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by sgt_shultz In reply to Domain is not available

one wonders why the bdc crashed...
got virus?

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