|| Apart from what is mentioned in the README files, be sure that
LDAP access to the site in enabled. (Go to Exchange
Administrator, expand your site Configuration and select
HTTP access, of course, must be turned on also.
And to sum up a few necessary settings mentioned in the README
- Users who will access Exchange must have Log On Locally permissions (granted in User Manager) for the Web Server.
- If turning on anonymous access to public folders, the Guest account on the Web Server must be enabled.