To avoid any mishap, keep a backup of your Excel Ribbon customization by exporting to a file before importing any new customizations. Remember that when you import a Excel Ribbon customization file, Excel Ribbon and Quick Access Toolbar customizations you made on that computer will be replaced by the customizations from the import file. Once you click 'OK' button, Excel Ribbon and Quick Access Toolbar (QAT) customizations will be imported. Step 6 - Click 'OK' button to import Excel Ribbon customization file, as shown in below image. Note that all existing customizations of your Excel Ribbon and Quick Access Toolbar (QAT) will be replaced by the customizations from the import file. Step 5 - Click 'Yes' button in the confirmation prompt as shown in below image. Select the export file and then click 'Open' button, as shown in below image. Step 4 - Browse to the location where the 'Excel Customizations.exportedUI' XML export file is stored using 'File Open' dialog box. Note that the custom Ribbon Tab and Group are not available on right-side list.

Step 3 - Click 'Import/Export' button and then select 'Import customization file', as shown in below image. Step 2 - Open 'Excel Options' window's Customize Ribbon panel by following the first and second steps from the beginning of this lesson. Step 1 - Copy and transport the 'Excel Customizations.exportedUI' XML file to the destination computer. How to import Excel Ribbon customization File Step 4 - Copy the 'Excel Customizations.exportedUI' XML file to the destination computer. Note that the default name for the Quick Access Toolbar customizations export file is 'Excel Customizations.exportedUI', which you may change if required. Step 3 - Click 'Save' button to export your Excel Ribbon customizations to a folder as shown in below image. Step 2 - Click 'Import/Export' split button and then select 'Export all customizations', as shown in below image. Right-click anywhere on the 'Quick Access Toolbar' (except on 'Customize Quick Access Toolbar' drop-down button).Click the 'File' tab in Excel Ribbon and then click 'Options'.

'Excel Options' window to customize Excel Ribbon can be opened by following methods also.

How does excel import xml