Polycom CX600, Lync 2013 On-prem and Exchange Online UM (hybrid).


  • We use Polycom CX600 phones dedicated for our on-prem Lync 2013, and I’m trying to get my CX600 to integrate with my Exchange Online but it doesn’t seem to be working.  I can make/receive calls and check voicemail just fine but I'm getting the dreaded "Microsoft Exchange integration unavailable" exclamation which expands to "Connection to Exchange is unavailable due to invalid network credentials".  I try to sign in with the USB-tether but it doesn't change anything.  We are running Exchange 2013 on-prem and Exchange Online via 365 E4.  Exchange 2013 on-prem for all my users and the CX600s are fully functional (I can see calendar, contacts, call logs.).  For my Exchange Online, I’ve moved only my account and I am no longer able to see my calendar, contact and call logs on the CX600.  Everything works fine with the Lync 2013 client.  I think this has something to do with it only have a single authentication mechanism on the CX600.  Is there any known workaround to getting EO to work with CX600 phones while having it also continue working for Exchange on-premises?  We are hoping to have a gradual migration to EO where only 50% of our users are moved now and 50% moved much later.  Thank you.

    • Edited by 13lind Wednesday, October 09, 2013 2:03 PM
    Wednesday, October 09, 2013 2:02 PM


  • Okay, so I read an article that indicated using to log into Lync when tethering the phone via USB for initial sign-in.  By default, it was populating domain\username which always took, but wouldn't integrate with Exchange.  After using it appears I can see my calendar, call logs and searchable contacts.
    • Marked as answer by 13lind Tuesday, October 15, 2013 3:55 PM
    Wednesday, October 09, 2013 4:22 PM

All replies