I've installed Lync standard edition with: 1 front end server + 1 edge server. Lync web service running on 2nd NIC on front end server. When two external client (different LAN) trying to share a PPT slide: sender can see notification about uploading success and see the slide, another one got an error:
"This slide couldn't be downloaded. Please contact...., Error reason: Name not resolved"
. I'm trying to google but nothing found about this error. Another features: A/V conf, desktop sharing, whiteboard still works. I can see Lync connected to front end server but still have notification about not success sync corp address book. Any idea?