Exchange 2007 OWA: There was a problem accessing Active Directory

I'm having the following issue when attempting to access OWA for Exchange 2007. I have attempted the fixes that have previously been posted for this issue. The accounts are set to allow inheritable permissions, and the setup.com /preparead command has been executed. I've also created a new account and user mailbox that was originally setup in the Exchange 2k7 environment, and I still have this issue with that account. Any suggestions?

Url: https://<servername>:443/owa/lang.owa
User host address: <client IP address>

Exception
Exception type: Microsoft.Exchange.Data.Storage.StoragePermanentException
Exception message: There was a problem accessing Active Directory.

Call stack

Microsoft.Exchange.Data.Storage.ExchangePrincipal.Save()
Microsoft.Exchange.Clients.Owa.Core.RequestDispatcher.DispatchLanguagePostLocally(OwaContext owaContext, OwaIdentity logonIdentity, CultureInfo culture, String timeZoneKeyName, Boolean isOptimized)
Microsoft.Exchange.Clients.Owa.Core.RequestDispatcher.DispatchLanguagePostRequest(OwaContext owaContext)
Microsoft.Exchange.Clients.Owa.Core.RequestDispatcher.PrepareRequestWithoutSession(OwaContext owaContext, UserContextCookie userContextCookie)
Microsoft.Exchange.Clients.Owa.Core.RequestDispatcher.InternalDispatchRequest(OwaContext owaContext)
Microsoft.Exchange.Clients.Owa.Core.RequestDispatcher.DispatchRequest(OwaContext owaContext)
System.Web.HttpApplication.SyncEventExecutionStep.System.Web.HttpApplication.IExecutionStep.Execute()
System.Web.HttpApplication.ExecuteStep(IExecutionStep step, Boolean& completedSynchronously)

Inner Exception
Exception type: Microsoft.Exchange.Data.Directory.ADOperationException
Exception message: Active Directory operation failed on et3kdc01.FKNC.local. This error is not retriable. Additional information: Insufficient access rights to perform the operation. Active directory response: 00002098: SecErr: DSID-03150A45, problem 4003 (INSUFF_ACCESS_RIGHTS), data 0

Call stack

Microsoft.Exchange.Data.Directory.ADSession.AnalyzeDirectoryError(PooledLdapConnection connection, DirectoryRequest request, DirectoryException de, Int32& retries, Int32 maxRetries)
Microsoft.Exchange.Data.Directory.ADSession.ExecuteModificationRequest(ADRawEntry entry, DirectoryRequest request, ADObjectId originalId)
Microsoft.Exchange.Data.Directory.ADSession.Save(ADObject instanceToSave, IEnumerable`1 properties)
Microsoft.Exchange.Data.Storage.ExchangePrincipal.Save()

Inner Exception
Exception type: System.DirectoryServices.Protocols.DirectoryOperationException
Exception message: The user has insufficient access rights.

Call stack

System.DirectoryServices.Protocols.LdapConnection.ConstructResponse(Int32 messageId, LdapOperation operation, ResultAll resultType, TimeSpan requestTimeOut, Boolean exceptionOnTimeOut)
System.DirectoryServices.Protocols.LdapConnection.SendRequest(DirectoryRequest request, TimeSpan requestTimeout)
Microsoft.Exchange.Data.Directory.PooledLdapConnection.SendRequest(DirectoryRequest request, LdapOperation ldapOperation)
Microsoft.Exchange.Data.Directory.ADSession.ExecuteModificationRequest(ADRawEntry entry, DirectoryRequest request, ADObjectId originalId)