If the user Active Directory profile contains photo, it would be displayed in the user card. To upload photo manually, click Upload photo.
User photo can be written to thumbnailPhoto or jpegPhoto attributes. Attribute selection is performed in Indeed CM Setup Wizard. Service account ("servicecm") must have privileges to write the selected attribute (see Configuring the user catalog in Active Directory).
The size of photo uploaded to this attribute, cannot exceed 100 Kb.