Excel add-in: do not target IE11?

Question

My team is developing an Excel add-in, and we do not wish to support IE11. Is there any way to specify (probably in the manifest file?) that our add-in is not available for any platforms/versions of Excel that use IE to render add-ins?

Answer 1

Probably too late to help the OP, but here's the documentation to display a custom message like "We don't support IE11 in this add in":

https://learn.microsoft.com/en-us/office/dev/add-ins/develop/support-ie-11?tabs=ie

if (navigator.userAgent.indexOf("Trident") !== -1) {
    /*
       IE11 is the browser in use. Do one of the following:
        1. Provide an alternate add-in experience that doesn't use any of the HTML5
           features that aren't supported in IE11.
        2. Enable the add-in to gracefully fail by adding a message to the UI that
           says something similar to:
           "This add-in won't run in your version of Office. Please upgrade either to
           perpetual Office 2021 or to a Microsoft 365 account."
    */
} else if (navigator.userAgent.indexOf("Edge") !== -1) {
    /*
       Microsoft Edge Legacy is the browser in use. Do one of the following:
        1. Provide an alternate add-in experience that's supported in Microsoft Edge Legacy.
        2. Enable the add-in to gracefully fail by adding a message to the UI that
           says something similar to:
           "This add-in won't run in your version of Office. Please upgrade either to
           perpetual Office 2021 or to a Microsoft 365 account."
    */
} else {
    /* 
       Another browser, other than IE11 or Microsoft Edge Legacy, is in use.
       Provide a full-featured version of the add-in here.
    */
}