Hi,

We have updated EPiServer.CMS.TinyMce to 4.1.0 from 3.3.0 and this has cause the style formats to not showing up in TinyMCE.

using EPiServer.Cms.TinyMce.Core;
using EPiServer.ServiceLocation;
using Microsoft.Extensions.DependencyInjection;

namespace MitAkademikernes.Business.Initialization
{
    public static class CustomizedTinyMceInitializationExtension
    {
        public static IServiceCollection AddTinyMceCustomizations(this IServiceCollection services)
        {
            services.Configure<TinyMceConfiguration>(config =>
            {
                // Add the advanced list styles, table, and code plugins
                // and append buttons for inserting and editing tables
                // and showing source code to the toolbar
                config.Default()
                .AddEpiserverSupport()
                 .AddPlugin("media wordcount anchor code searchreplace")
                    .Toolbar("blocks fontsize | epi-personalized-content epi-link anchor numlist bullist indent outdent bold italic underline code",
                        "alignleft aligncenter alignright alignjustify |image epi-image-editor media | epi-dnd-processor | forecolor backcolor | removeformat | searchreplace fullscreen")
                    .StyleFormats(
                        new { title = "Accordion heading", block = "h2", classes = "accordion-header" }
                    )
                .AddSetting("image_class_list", new[] { xxx })
                ;
            });
            return services;
        }
    }
}

Accordion heading style format just add the class -> 

This is how it looked before upgrading to TinyMCE 4.1.0:

Now it looks like this without Formats button: