Images in Microsoft Teams notifications

Hi all,

did a search but found nothing comparable.
Did sombody alredy get Microsoft Teams notifications working as well as the test notification?
In my notifications I only get 2 sensors with it´s values working, but I miss the image.

I changed the grafana.ini, deleted the ; chars in front of the depending S3 lines and set my values, but I don´t get the image in my notifications:
provider = s3

[external_image_storage.s3]
bucket = ****.********.net
region = ********
path = *****
access_key = ************
secret_key = ***********