title: AD thumbnail photo byte format \FF\ and \89\
body: <p>what will affect the byte format of ad thumbnailphoto attribute?
  Im facing an issue where whatever photo i upload with my apps it will start with \FF\ but it is not accepted by exchange. However if upload with exclaimer it will be in \89\ format which able to show in exchange and teams. Ive tried different photo and format still come up with same result.</p>
  <p><a href="https://i.stack.imgur.com/Wucch.png" rel="nofollow noreferrer"><img src="https://i.stack.imgur.com/Wucch.png" alt="\FF\ attribute thumbnailphoto" /></a></p>
  <p><a href="https://i.stack.imgur.com/JCSaA.png" rel="nofollow noreferrer"><img src="https://i.stack.imgur.com/JCSaA.png" alt="\89\ attribute thumbnailphoto" /></a></p>