Background images in Teams announcement no longer possible

Hi SvenJHH,

here are some information regarding your issue:

1. Some users have reported that the option to add background images to announcement posts is missing, particularly in new Teams experiences.

2. it is mentioned that Microsoft might be planning to add a feature called "Designer" to create more powerful banners. 

You can use Designer in Microsoft Teams (free) on Windows 11 to create announcement banners for community announcements. This feature allows you to add and customize images for your announcements.

To create a community announcement banner with Designer:

1. Go to the community where you want to use Designer.
2. Select "Announcement," and then click the "Background image Create with Designer" button in Teams.
3. You'll have the option to add an image, generate an image, or explore ideas from existing images.
4. After selecting an image, you can customize the size, text, and layout.
5. When you're ready, select "Done" to add the image to your community announcement.
6. You can then post your announcement to the community.

This suggests that while traditional background images in announcements may be missing, the use of Designer within Microsoft Teams provides an alternative for creating visually appealing announcement banners.

Background Images within Announcement posts - Microsoft Community Hub

Create a community announcement banner with Designer in Microsoft Teams (free) - Microsoft Support