The article is taken from Centrify Knowledge Base (KB-1425): adclient goes into “disconnected mode”

Causes

There are several reasons why adclient can goes into disconnect mode. According to the article, it could be due to

• Replication Delays
• Expired Computer Password or not renewed or out of sync

Solution:

In Linux, you can restart the Centrify DirectControl Service

# /etc/init.d/centrifydc restart
Stopping Centrify DirectControl:                           [  OK  ]
Starting Centrify DirectControl:                           [  OK  ]
adclient state is: connected

OR you can reset computer object on UNIX/LINUX client:

# adkeytab -r -u administrator@yourdomain.com

Notes:

Machine password renewal can be turned off (for testing purposes only) in /etc/centrifydc/centrifydc.conf by making the following change and running adreload. (Default is 28 days)

adclient.krb5.password.change.interval: 0