APPS Issue after upgrade from exchange 2010 to 2013

Hi All,

When I try to add an app ( like linkedin ) in the ecp "Exchange admin Center" I got the below errors. The thing is that I want to roll out apps for my users in a central way. 

I hope someone can help me with this one.

XML CODE :

Log Name:      Application

Source:        MSExchangeApplicationLogic

Date:          24-10-2013 10:29:21

Event ID:      3054

Task Category: Extension

Level:         Error

Keywords:      Classic

User:          N/A

Computer:      NLVRY5803AP8905.domain.local

Description:

Scenario: ProcessOrgExtensions. The organization mailbox for cpmail.nl could not be retrieved.

Event Xml:

<Event xmlns="http://schemas.microsoft.com/win/2004/08/events/event">

  <System>

    <Provider Name="MSExchangeApplicationLogic" />

    <EventID Qualifiers="49156">3054</EventID>

    <Level>2</Level>

    <Task>3</Task>

    <Keywords>0x80000000000000</Keywords>

    <TimeCreated SystemTime="2013-10-24T08:29:21.000000000Z" />

    <EventRecordID>40096</EventRecordID>

    <Channel>Application</Channel>

    <Computer>NLVRY5803AP8905.domain.local</Computer>

    <Security />

  </System>

  <EventData>

    <Data>ProcessOrgExtensions</Data>

    <Data>cpmail.nl</Data>

  </EventData>

</Event>