Remove the specific client from cell_info file then login GUI
Windows: C:\Program Files\Omniback\Config\server\cell\cell_info
Unix: /etc/opt/omni/server/cell/cell_info
Remove the specific client from cell_info file then login GUI
Windows: C:\Program Files\Omniback\Config\server\cell\cell_info
Unix: /etc/opt/omni/server/cell/cell_info