Error when Creating new Mailbox - PowerShell - Storage Error

Question

Hi Guys,
I have been working on a new exchange install and when I try to create a new mailbox or new mailboxdatabase I keep getting the following error.
WARNING: The cmdlet extension agent with the index 0 has thrown an exception in OnComplete(). The exception is:
System.TypeInitializationException: The type initializer for
'Microsoft.Exchange.Data.Storage.NativeStorePropertyDefinitionDictionary' threw an exception. --->
System.NotSupportedException: Not supported field(MailEnabled)
type(Microsoft.Exchange.Data.Storage.PropertyTagPropertyDefinition).
   at
Microsoft.Exchange.Data.Storage.NativeStorePropertyDefinitionDictionary.PropertyDefinitionSets.BuildWellKnownSets()
   at Microsoft.Exchange.Data.Storage.NativeStorePropertyDefinitionDictionary..cctor()
   --- End of inner exception stack trace ---
   at Microsoft.Exchange.Data.Storage.PropertyTagPropertyDefinition.TryFindEquivalentDefinition(PropTagKey key, Boolean
 isCustom, PropType type, TypeCheckingFlag typeCheckingFlag, PropertyTagPropertyDefinition& definition, Boolean&
createNewDefinition)
   at Microsoft.Exchange.Data.Storage.PropertyTagPropertyDefinition.InternalCreate(String displayName, PropTag
propertyTag, PropertyFlags flags, TypeCheckingFlag typeCheckingFlag, Boolean isCustom, PropertyDefinitionConstraint[]
constraints)
   at Microsoft.Exchange.Data.Storage.PropertyTagCache.InternalPropertyDefinitionsFromPropTags(TypeCheckingFlag
propertyTypeCheckingFlag, MapiProp mapiProp, StoreSession storeSession, PropTag[] propTags, Int32&
resolvedPropertyCount)
   at Microsoft.Exchange.Data.Storage.RecipientTable.GetRecipientPropertyDefinitionsFromMapiTable(Boolean&
originalColumnsChanged)
   at Microsoft.Exchange.Data.Storage.RecipientTable.BuildRecipientCollection(Action`2 recipientCollectionBuilder)
   at Microsoft.Exchange.Data.Storage.CoreRecipientCollection..ctor(ICoreItem coreItem)
   at Microsoft.Exchange.Data.Storage.CoreItem.Microsoft.Exchange.Data.Storage.ICoreItem.GetRecipientCollection(Boolean
 forceOpen)
   at Microsoft.Exchange.Data.Storage.CoreItem.GetRecipientCharsetDetectionData(StringBuilder stringBuilder, Boolean
isComplete)
   at Microsoft.Exchange.Data.Storage.ItemCharsetDetector.BuildCodePageDetector(MemoryStream& cachedHtmlBody)
   at Microsoft.Exchange.Data.Storage.ItemCharsetDetector.DetectCpidWithOptions(Charset userCharset, MemoryStream&
cachedHtmlBody)
   at Microsoft.Exchange.Data.Storage.ItemCharsetDetector.SetCachedBodyDataAndDetectCharset(Char[] cachedBodyData,
Charset userCharset, BodyCharsetFlags charsetFlags)
   at Microsoft.Exchange.Data.Storage.BodyCharsetDetectionStream.CalculateCharset()
   at Microsoft.Exchange.Data.Storage.BodyCharsetDetectionStream.OnBufferFull()
   at Microsoft.Exchange.Data.Storage.BodyCharsetDetectionStream.CloseDetectorConversionStream()
   at Microsoft.Exchange.Data.Storage.BodyCharsetDetectionStream.Flush()
   at Microsoft.Exchange.Data.TextConverters.ConverterEncodingOutput.Flush()
   at Microsoft.Exchange.Data.TextConverters.Internal.Text.TextCodePageConverter.Run()
   at Microsoft.Exchange.Data.TextConverters.Internal.Text.TextCodePageConverter.Flush()
   at Microsoft.Exchange.Data.TextConverters.ConverterWriter.Flush()
   at Microsoft.Exchange.Data.TextConverters.ConverterWriter.Dispose(Boolean disposing)
   at System.IO.TextWriter.Close()
   at Microsoft.Exchange.Data.Storage.BodyTextWriter.<CloseWriter>b__11()
   at Microsoft.Exchange.Data.Storage.ConvertUtils.CallCts(Trace tracer, String methodName, LocalizedString
exceptionString, CtsCall ctsCall)
   at Microsoft.Exchange.Data.Storage.BodyTextWriter.CloseWriter()
   at Microsoft.Exchange.Data.Storage.BodyTextWriter.Dispose(Boolean disposing)
   at System.IO.TextWriter.Dispose()
   at Microsoft.Exchange.ProvisioningAgent.MailboxLoggerFactory.XsoMailer.Log(AdminLogMessageData data,
LogMessageDelegate logMessage)
   at Microsoft.Exchange.ProvisioningAgent.AdminLogProvisioningHandler.OnComplete(Boolean succeeded, Exception e)
   at Microsoft.Exchange.Provisioning.ProvisioningLayer.OnComplete(Task task, Boolean succeeded, Exception exception)
Does anyone have any idea what is causing this, the server is running Microsoft Exchange 2010 SP2. I don't want to complete an upgrade to SP3 until I have got this issue resolved first.
Any suggestion are welcome.
Kind Regards
TPark IT Technician

Answer 1

In terms of what's causing it, the clue is in the stack above. 
its one of the cmdlet extension agents.  Which one?  Well the one at index 0
Run this, and you should find its the Mailbox Creation Time Agent
Get-CmdletExtensionAgent | select Name, priority
Get-CmdletExtensionAgent | select Name, priority
I'd then run Test-Servicehealth to check services are all responding. 
Can you post the exact command you are running to get this?
Cheers,
Rhoderick
Microsoft Senior Exchange PFE
Blog:
http://blogs.technet.com/rmilne 
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