Exchange 2007 Virtual Directory Error - WebReadyFileType

Hi All, I have recently added a new CAS/Hub server to my farm and i notice a strange error in the new server. In the event Log i notice there is an warning event ID 2156 logged. The information reads

Event ID: 2156
Category: Validation
Source: MSExchange ADAccess
Process w3wp.exe (PID=708). Configuration object CN=owa (Default Web Site),CN=HTTP,CN=Protocols,CN=EX03,CN=Servers,CN=Exchange Administrative Group (FYDIBOHF23SPDLT),CN=Administrative Groups,CN=MSIG Organization,CN=Microsoft Exchange,CN=Services,CN=Configuration,DC=Mydomain,DC=com read from dc01.Mydomain.com failed validation and will be excluded from the result set. Set event logging level for Validation category to Maximum to get additional events about each failure.  

I enabled logging to be Maximum and Event ID 2161 and 2157 is logged. This is the cause

Process PowerShell.exe (PID=1624). Object CN=owa (Default Web Site),CN=HTTP,CN=Protocols,CN=EX02,CN=Servers,CN=Exchange Administrative Group (FYDIBOHF23SPDLT),CN=Administrative Groups,CN=MSIG Organization,CN=Microsoft Exchange,CN=Services,CN=Configuration,DC=Mydomain,DC=com read from dc01.Mydomain.com failed validation. Attribute: WebReadyFileTypes. Error message: '.xlsx' is not a valid value for WebReadyFileTypes. Valid values are: '.doc,.dot,.rtf,.xls,.ppt,.pps,.pdf'.. Invalid data: .xlsx.  

But i am wondering why this is happening because on the other servers there isn;t such an error. Also It is complaining about other servers and not itself. It is EX01 and it is complaining about EX02, EX03. if i run Get-OwaVirtualDirectory on EX01 i get the below, but if i run it on other CAS servers its fine. XLSX is entered there by default, i made no changes to the WebReady file types settings in EMC or EMS...

[PS] C:\Documents and Settings\administrator.MSIG>Get-OwaVirtualDirectory

Name                       Server                 OwaVersion
----                       ------                 ----------
owa (Default Web Site)     EX04                   Exchange2007
Exchange (Default Web S... EX04                   Exchange2003or2000
Public (Default Web Site)  EX04                   Exchange2003or2000
Exchweb (Default Web Site) EX04                   Exchange2003or2000
Exchange (Default Web S... mbserver               Exchange2003or2000
Public (Default Web Site)  mbserver               Exchange2003or2000
Exadmin (Default Web Site) mbserver               Exchange2003or2000
exchange (Default Web S... EX03                   Exchange2003or2000
public (Default Web Site)  EX03                   Exchange2003or2000
Exchweb (Default Web Site) EX03                   Exchange2003or2000
owa (Default Web Site)     EX03                   Exchange2007
owa (Default Web Site)     EX02                   Exchange2007
WARNING: Object EX02\owa (Default Web Site) has been corrupted and it is in
 an inconsistent state. The following validation errors have been encountered:
WARNING: '.xlsx' is not a valid value for WebReadyFileTypes. Valid values are:
'.doc,.dot,.rtf,.xls,.ppt,.pps,.pdf'.
WARNING: '.pptx' is not a valid value for WebReadyFileTypes. Valid values are:
'.doc,.dot,.rtf,.xls,.ppt,.pps,.pdf'.
WARNING: '.docx' is not a valid value for WebReadyFileTypes. Valid values are:
'.doc,.dot,.rtf,.xls,.ppt,.pps,.pdf'.
WARNING:
'application/vnd.openxmlformats-officedocument.presentationml.presentation' is
not a valid value for WebReadyMimeTypes. Valid values are:
'application/msword,application/vnd.ms-excel,application/x-msexcel,application/
vnd.ms-powerpoint,application/x-mspowerpoint,application/pdf'.
WARNING:
'application/vnd.openxmlformats-officedocument.wordprocessingml.document' is
not a valid value for WebReadyMimeTypes. Valid values are:
'application/msword,application/vnd.ms-excel,application/x-msexcel,application/
vnd.ms-powerpoint,application/x-mspowerpoint,application/pdf'.
WARNING: 'application/vnd.openxmlformats-officedocument.spreadsheetml.sheet' is
 not a valid value for WebReadyMimeTypes. Valid values are:
'application/msword,application/vnd.ms-excel,application/x-msexcel,application/
vnd.ms-powerpoint,application/x-mspowerpoint,application/pdf'.
WARNING: '.xlsx' is not a valid value for WebReadyFileTypes. Valid values are:
'.doc,.dot,.rtf,.xls,.ppt,.pps,.pdf'.
WARNING: '.pptx' is not a valid value for WebReadyFileTypes. Valid values are:
'.doc,.dot,.rtf,.xls,.ppt,.pps,.pdf'.
WARNING: '.docx' is not a valid value for WebReadyFileTypes. Valid values are:
'.doc,.dot,.rtf,.xls,.ppt,.pps,.pdf'.
WARNING:
'application/vnd.openxmlformats-officedocument.presentationml.presentation' is
not a valid value for WebReadyMimeTypes. Valid values are:
'application/msword,application/vnd.ms-excel,application/x-msexcel,application/
vnd.ms-powerpoint,application/x-mspowerpoint,application/pdf'.
WARNING:
'application/vnd.openxmlformats-officedocument.wordprocessingml.document' is
not a valid value for WebReadyMimeTypes. Valid values are:
'application/msword,application/vnd.ms-excel,application/x-msexcel,application/
vnd.ms-powerpoint,application/x-mspowerpoint,application/pdf'.
WARNING: 'application/vnd.openxmlformats-officedocument.spreadsheetml.sheet' is
 not a valid value for WebReadyMimeTypes. Valid values are:
'application/msword,application/vnd.ms-excel,application/x-msexcel,application/
vnd.ms-powerpoint,application/x-mspowerpoint,application/pdf'.
Exchange (Default Web S... EX02                   Exchange2003or2000
Public (Default Web Site)  EX02                   Exchange2003or2000
Exchweb (Default Web Site) EX02                   Exchange2003or2000
owa (Default Web Site)     EX01                   Exchange2007
Exchange (Default Web S... EX01                   Exchange2003or2000
Public (Default Web Site)  EX01                   Exchange2003or2000
Exchweb (Default Web Site) EX01                   Exchange2003or2000Start Free Trial