logo
search
Office Settings & Configuration

How to Fix Outlook Ribbon Customization Import Errors

Steven ParkerSteven Parker Oct 20, 2026 870 views

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.

How to Fix Outlook Ribbon Customization Import Errors
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."
Before you start

Verify the exact name of your exported customization file (e.g., olkexplorer, olkmailitem) to determine which specific Outlook view it was originally exported from.

Solution 1Recommended

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.

1
Identify the target view

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.

2
Open the correct Outlook window

Navigate to the appropriate view in Outlook. For an 'olkmailitem' file, click 'New Email' to open the message composition window.

3
Access Ribbon Customization

Right-click anywhere on the empty space of the Ribbon and select 'Customize the Ribbon' from the context menu.

4
Import the file

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'.

Import the Customization File into the Matching Outlook View
Matching Names: Files named 'Outlook Customizations (olkexplorer).exportedUI' are intended for the main window, whereas 'olkmailitem' files are exclusively for the email message composition window.
Free Microsoft Office alternative

Experience a Clutter-Free Interface with WPS Office

Tired of dealing with complex ribbon configurations, separate item types, and import errors? WPS Office offers a sleek, intuitive, and highly compatible alternative to Microsoft Office. Enjoy a unified workspace without the hassle of managing isolated customization files for different windows.

  1. 1. Download the installer: Visit the official WPS Office website and click the free download button for your operating system.
  2. 2. Install the software: Run the downloaded installation file and follow the straightforward on-screen instructions to set up your workspace.
  3. 3. Enjoy a unified ribbon: Open WPS Office and instantly access a unified, familiar ribbon interface to seamlessly handle all your office tasks.
Intuitive, unified ribbon interface that is easy to manage without complex file dependencies.Fully compatible with Microsoft Word, Excel, and PowerPoint formats (.docx, .xlsx, .pptx).All-in-one tabbed workspace to manage documents, spreadsheets, and presentations in a single app.Lightweight design that runs smoothly on Windows, Mac, and Linux systems.
QA img-9

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'.