One month ago we decided to unite the Trello and the Outlook, but it is not work, unfortunately.
We had an issue connecting Trello to Exchange 2013 Version 15.0 (Build 1076). At the moment of connecting Trello, an error occurs: Unable to cast object of type 'Microsoft.Exchange.Management.Extension.OWAAppDataProviderForNonMailboxUser' to type 'Microsoft.Exchange.Management.Extension.OWAExtensionDataProvider'.
Could you please be so kind to help us solving this issue?