Thank you all for your quick answers. I've tried with Repository Manager but setup was failing since it cannot detect .Net 4.5.1 despite it is installed in the system. The final workaround has been to create an ISO with the BIOS update for Windows 32 bit and to boot in the LifeCycle Controller to perform the upgrade. Thanks again. Best regards, Luca 
We are using Dell OME version 1.3.0.1533 and we have urgent need to upgrade the BIOS of 10 servers R720 to version 2.2.3. The Catalog source is ftp://ftp.dell.com/catalog/catalog.cab and is correctly updated. OME has correctly upgraded DRAC and LifeCycle Controller to latest version which have been released in the first days of May, but is not detecting the BIOS update to version 2.2.3 which has been released on May 30. Ho can I force an update to the catalog to include BIOS update? Thanks in advance. Best regards, Luca   
Dell OME 1.3.0 not showing latest BIOS for DELL R720