RE: Event Management missing in Advanced settings
Hi Joanna,
The feature is actually inclluded in trial version.
Below is my trial sceenshot:
Please try to clear browser cache to check again or change a different browser.
Also, you can get Event Management in Advanced settings
If the icon is not available, you could enter the URL directly to enter settings page.
https://orgurl/main.aspx?settingsonly=true
For webinar, currently on24 is the only provider supported for use with Dynamics 365 Marketing,
you should also ask a trial account from them.
Regards,
Clofly