Hello @Kamil Musiejkiewicz,
Welcome to Atlassian Community!
The profile pictures shown on a Cloud site it's actually stored in Gravatar and not in Atlassian.
With this said, it's not possible to sync and update the users' profile picture from Azure. Users must access their profile on https://id.atlassian.com/manage-profile/profile-and-visibility and manually change their picture.
There is a feature request suggesting improvements for that:
Please, click on vote and watch to receive updates about the feature.
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