Splunk App for Microsoft Exchange: Why am I getting error "Mapping for unqualified users not provided" during initial setup?

[seanp]

I am trying to setup the Splunk App for Microsoft Exchange and going through the wizard for initial setup. I get to the Domain Aliases screen to add mappings between domain alias and FQDN.

Currently I have this set to:
mydomain -> mydomain.com

However I get an error stating:
Mapping for unqualified users not provided.

Any advice why I am seeing this message?

[seanp · Accepted solution]

Resolved issue, didn't select default unknown users. Didn't realize it was a drop down.