I'm having lots of troubles configuring Sharepoint 2013 to fetch user profile pictures from Exchange 2013 and I've already asked a question about the whole problem. Here I want to ask something more specific.
In the Sharepoint ULS I cannot find any traces that report a call to the Exchange Web Services, nor to the "GetPhoto" URL (see below), nor anything that I can relate to Exchange. I tried filtering by several keywords (exchange, photo, picture, pictureUrl, autodiscover, etc...) and I couldn't find anything.
Am I wrong about my presumption that such a call should be logged in ULS?
Is there a way to sniff the Sharepoint's outgoing traffic and sort it out in order to find what happend between it and Exchange? (this would probably help me a lot in troubleshooting)
I know that Exchange is reachable without problems from the Sharepoint machines, both through a browser and through PowerShell scripts that use Microsoft.Exchange.WebServices.dll. In particular I checked that the following URL responds with the desired image file:
There are no errors, no warnings whatsoever, everything is apparently configured fine except that the images won't show in the user profiles.