Log in to the DD via the CLI as sysadmin, and enter SE privilege mode. The system password is the Data Domain serial number.

# system show serialno

# priv set se

# Enter system password:

Disable http and https services on the Data Domain to bring down the GUI process:

# adminaccess disable http
# adminaccess disable https

Enable http and https services on the Data Domain to re start the GUI process:

# adminaccess enable http
# adminaccess enable https


Wait for a couple of minutes to allow services to fully initialize