Hi @mzucal - we have not yet installed the new Microsoft LTI. You might be interested in the Microsoft 365 LTI Office Hours, which meets every 1st and 3rd Thursday at 11AM EST. The office hours meeting is led by TJ Vering from Microsoft. He is able to answer many questions. Here is the meeting link:
https://aka.ms/LTIOfficeHours
LMS admins from various LMSs discuss issues they have noticed and ask questions. I have been attending the last two meetings during which many had questions and others, who already installed the new LTI, were able to provide insights to solutions/workarounds for issues they experienced. The office hours were announced in a Microsoft blog post: Enhance your LMS with the power of Microsoft 365.