When trying to enumerate the organization in a native Exchange 2007 environment, this error message may be seen: "Exhausted results while trying to find a system mailbox user, and could not locate any." Or "Failed to log on to MAPI"
There has been a change in permissions regarding Exchange 2007.
The account being used to establish a connection will need to be added to the Exchange Recipient Administrators group. This can be also done in Powershell using this command
Add-ExchangeAdministrator -Role RecipientAdmin -Identity User@domain
