The common errors that can happen when trying to configure our service will be logged to your account history in the Control panel -> Account Usage -> Error Log with the exception of incorrect username / password errors, so if you are having a problem please check those error logs.
If you have questions specifically about configuring or troubleshooting Exchange 2016 please use the Official Microsoft Exchange 2016 Documentation - due to the complexities of Microsoft Exchange we can only provide basic troubleshooting advice.
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