If all mail icons disappear from the Front Panel, replace them from the $HOME/.dt/fp.dynamics directory.
Assume the System Administrator role and go to an ADMIN_HIGH
workspace.
Investigate the account's .dt/fp.dynamics directory in its home directory.
During the operation of the system, all changes to the Front Panel are stored in each account's .dt/fp.dynamics directory at the session clearance.
Copy the contents of fp.dynamics to a backup directory and restore the files one by one until the Front Panel configuration is restored.