In exchange 2013 via OWA your user can easily change their photo. To disable this feature, simply do the following :
- Launch Microsoft Exchange 2013 Management Shell
- Type the following command :
Set-OwaVirtualDirectory -id "owa (Default Web Site)" -SetPhotoEnabled $False
Note: this will be applied to all users.
If you want to apply only to certain user use OwaMailboxPolicy instead …
That’s it .. you’re done …