We are using a hybrid setup with Office 365, Wave 15. We have dirsync setup to sync every 4 hours and it is working perfectly, except for one thing... Changes to existing Exchange thumbnail photos don't update as quickly as a newly added thumbnail photo.
I have had to wait up to a week for the change to the thumbnail photo to show up in Exchange Online. It's almost like it's cached on the Microsoft servers. I was curious if anyone else has experienced this or has an explanation.
I've cleared out my browser cookies, tried from different PC's, etc..
Thanks in advance!