Please refer to these KB articles:

1. The connection refused message is normally related either with permission or bad username and password or account lock.

LINK: Minimum permissions required for View Composer (1007659) | VMware KB

2. After you make sure that the permissions are right, restart the View environment to clear ADLDS (ADAM) synchronization in Horizon View

LINK: Restart order of the View environment to clear ADLDS (ADAM) synchronization in Horizon View (2068381...

Raul.

VMware VDI Administrator

http://ITCloudStream.com/