How to customize the number of items for a drop-down list on the Outlook Ribbon?

IFI Test 3 1 Reputation point
2021-07-22T03:00:17.537+00:00

We have a dropdown list on ribbon for Outlook appointments.

  • We have about 1500 items in the drop down list. However it cannot display them.
  • We have tested with about 1000 items, it shows normally.

How to customize the number of items in the dropdown?

Note: I'm using: Outlook for Microsoft 365

Office Development
Office Development
Office: A suite of Microsoft productivity software that supports common business tasks, including word processing, email, presentations, and data management and analysis.Development: The process of researching, productizing, and refining new or existing technologies.
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