Exchange 2010 Public Folder Database not listed, can't mount new DB

Hi,
I have been trying to dig myself out of an Exchange problem and have realised I needspecific  help rather than just checking other posts.

I had a SBS2003 server with exchange. I have migrated to Ex2010.

All seemed fine for months until I added some new mailboxes recently who didn't show up in OAB GAL. So I started investigating. Event log had numerous errors about replications failing and OAB referencing the old server (decommissioned). So I found the relevant entries in ADSI edit and started fixing issues.
I managed to get Event log happy, no errors. However the Public Folders wouldn't accept any emails: The Active Directory user wasn't found.
So googled it, found fix (again an edit in ADSI) and I have now (foolishly) removed all references to the old "first administartive group", after a reboot it is worse. In Database Management tab the Public Folder Database isn't listed. I can't find a way to relist it and trying to create a new one fails.

In event log now i'm getting this: Event ID 231
the copy of database 'Public Folder Database 1' on this server encountered an error during the mount operation.

I'm not overly bothered about the old public folder db, if i can mount it then happy dys, if not I know what all the folders were and can recreate in new DB. will loss emails but hey, these things happen.

I'm sure there is loads of info I'll need to post, so ask away. I'm not sure what is relevant at this stage.
OAB is not updating, so cached mode Outlook users aren't seeing lasted GAL, but I assume this will be a PF replication issue.

Thanks
Pete_AdminAsked:
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Pete_AdminConnect With a Mentor Author Commented:
Well, i followed this http://www.vware.at/?p=169 which is almost the same as guide above and got the store remounted.
Then Mail disabled PF's and re-enabled and I'm back in business.
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Pete_AdminAuthor Commented:
The event logs are now in a loop with the following errors/warnings every couple of minutes:

MSExchangeIS 9519
While starting database f701995f-5a05-4647-a5a7-df3ad3ffba40, the following error occurred: 0x972.  
Look up of DB Info failed.

MSExchangeRepl 3154
Active Manager failed to mount database Public Folder Database 1 on server EX2010.DOMAIN.local. Error: An Active Manager operation failed with a transient error. Please retry the operation. Error: Database action failed with transient error. Error: A transient error occurred during a database operation. Error: MapiExceptionADPropertyError: Unable to mount database. (hr=0x80004005, ec=2418)

ExchangeStoreDB 231
At '21/02/2011 22:38:22', the copy of database 'Public Folder Database 1' on this server encountered an error during the mount operation. For more information, consult the Event log on the server for "ExchangeStoreDb" or "MSExchangeRepl" events. The mount operation will be tried again automatically.

MSExchangeADAccess 2159
Process Microsoft.Exchange.RpcClientAccess.Service.exe (PID=7684). Configuration object CN=Public Folder Database 1,CN=Databases,CN=Exchange Administrative Group (FYDIBOHF23SPDLT),CN=Administrative Groups,CN=DOMAIN,CN=Microsoft Exchange,CN=Services,CN=Configuration,DC=DOMAIN,DC=local read from DCSERVER.DOMAIN.local failed validation and will be excluded from the result set.  Set event logging level for Validation category to Expert to get additional events about each failure.
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Pete_AdminAuthor Commented:
FYI - I went through this guide: http://technet.microsoft.com/en-us/library/bb727370(EXCHG.80).aspx but couldn't follow it exactly.

I had to create CN=Folder Hierarchies under the new EX2010 Exchange Administrative Group as it was only in First Admin Group (old SBS one) and I wanted to remove this, guess the migration didn't complete properly and I couldn't move it.

This Container was the only container to contain anything in the First Admin Group, so after creating it in Exchange Admin Group I felt safe to remove the First Admin Group completely, i was wrong.
In the guide, see Solution 1 step 12 In the Attributes list, select distinguishedName, and then click Edit.

I didn't have anything to paste here (no good one to copy) so I may have this entry wrong which could be my issue. Step 14 says:

For each server exhibiting the MSExchangeIS 9519 event that has error code 0x972, navigate to the Public Folder Store object. The default location for this object is:

CN=Configuration,CN=Services,CN=Microsoft Exchange,CN=Organization,CN=Administrative Groups, CN=Exchange Administrative Group (FYDIBOHF23SPDLT), CN=Servers, CN= ServerName , CN= InformationStore , CN=Second Storage Group.

I don't have a CN=Second Storage Group in my InformationStore CN. Could this be the missing info i need?
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lukerussellCommented:
Thanks for pointing me in the right direction! This worked for me too.
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