How to Fix Outlook Ribbon Customization Import Errors
Question details
The user is unable to import a saved ribbon customization file in Outlook and receives an error stating that only a specific customization file from Microsoft Outlook can be imported.

- Product
- Microsoft Outlook
- Device & OS
- not provided
- Scenario
- Importing a saved .exportedUI file to restore or transfer customized ribbon and toolbar settings.
- Observed behavior
- Outlook blocks the import process and displays the error message: "Only a customization file from Microsoft Outlook (olkmailitem) can be imported."
Verify the exact name of your exported customization file (e.g., olkexplorer, olkmailitem) to determine which specific Outlook view it was originally exported from.
Import the Customization File into the Matching Outlook View
Match the customization file to its correct Outlook item type to resolve the import error and successfully apply your ribbon layout.
Outlook uses distinct ribbon environments for its main window (olkexplorer), emails (olkmailitem), calendar, contacts, and tasks. You can only import a customization file into the specific view it was exported from.
Look at the filename of your .exportedUI file. If it contains 'olkmailitem', you must import it from the email composition window. If it contains 'olkexplorer', it belongs to the main Outlook window.
Navigate to the appropriate view in Outlook. For an 'olkmailitem' file, click 'New Email' to open the message composition window.
Right-click anywhere on the empty space of the Ribbon and select 'Customize the Ribbon' from the context menu.
In the lower-right corner of the Outlook Options dialog, click the 'Import/Export' button, select 'Import customization file', choose your saved file, and click 'OK'.

Re-export the Customization File from the Source View
If you are trying to customize a specific view but have the wrong file, you must recreate or export the settings directly from that view on the original computer.
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Frequently Asked Questions
Why does Outlook have separate ribbon customization files?
Outlook utilizes distinct windows (main explorer, email composer, calendar, tasks) that perform entirely different functions. Separate customization files ensure that specialized tools relevant only to drafting an email do not clutter the main inbox view.
Can I apply my main Outlook ribbon settings to the email composition window?
No, ribbon configurations are view-specific in Microsoft Outlook. You cannot import an 'olkexplorer' (main window) file into the 'olkmailitem' (email composition) window. You must configure and export the layouts separately.
Where are the Outlook ribbon customization files saved by default?
When you choose to export ribbon customizations, Outlook prompts you to save an .exportedUI file. There is no default hidden directory for this; you must manually choose a destination, such as your Documents or Desktop folder, making it easy to locate for transfer.
How do I reset the Outlook ribbon if my imported customizations cause issues?
To reset the ribbon, open the specific Outlook window you want to fix, right-click the ribbon, and choose 'Customize the Ribbon'. In the options dialog, click the 'Reset' button at the bottom right, then choose either 'Reset only selected Ribbon tab' or 'Reset all customizations'.




