Custom PowerPoint Plugin Development -- 2

I'm looking to create a PowerPoint plugin that can be installed from an MSI file. This plugin needs to be compatible with PowerPoint 2019 and Microsoft 365. The plugin will have approximately 10-15 features, which include design tools, productivity enhancers, and collaboration features.

Key requirements:
- Development of a PowerPoint plugin with 10-15 features
- Ensuring compatibility with PowerPoint 2019 and Microsoft 365
- Installation of the plugin from an MSI file
- Creation of a custom toolbar for the plugin

Ideal skills and experience:
- Extensive experience in developing PowerPoint plugins
- Proficiency in creating MSI installation files
- Design and development of custom toolbars
- Implementing a mix of design, productivity, and collaboration features
- Familiarity with PowerPoint 2019 and Microsoft 365