“The connection to the server was unsuccessful. Please check the server name and/or credentials entered.
Additional Information: The source was not found, but some or all event logs could not be searched. Inaccessible logs: Security.”
If you receive this error, you need to read the Exchange Connector 3.0 documentation a little more carefully before heading to the Microsoft Download Center to download the Microsoft Exchange Web Service Managed API. You must be using version 1.2 of the API .dll file for Service Manager to work correctly. If you downloaded and used the later 2.0 version of the API, you will receive this error. This applies to all versions of Exchange including Office 365 or Exchange Online.