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The next test was to try and point the Exchange Autodsicover URL to the On-Premise Hybrid server. Log Name: Lync Server Source: LS Storage Service Date: 9/18/2015 PM Event ID: 32048 Task Category: (4006) Level: Information Keywords: Classic User: N/A Computer: Lync FE.Description: OAuth was properly configured for Storage Service.
Autodiscover.has a CNAME in DNS that resolves to autodiscover.If I open an Internet Browser and try the same request, I receive an ERR_CONNECTION_REFUSED. Even though step 6 in the above article states to configure it as so.
Likewise, when Exchange 2013 is introduced into the environment, the default values are derived from the server FQDN. The configurations that we will make should look something like this: Now, let’s look at some of the configuration. Assuming the following scenario: · Lync is deployed in a scaled consolidated topology using NAT · The 50k port range inbound is blocked · DNS load balancing · The External Corporate firewall is blocking Hairpin traffic Before Bob can send a SIP Invite message to Carol, Lync utilizes STUN, TURN, and ICE to discover a candidate list for completing the media path.
Your configuration may be different depending on how it was setup. After all testing is complete…it’s time to update the Exchange 2012/2007 URLs. Snooper reveals the following error: “Call failed to establish due to a media connectivity failure when one endpoint is internal and the other is remote” with an ICE Warning “ICEWarn=0x40003e0”.
While installing OWAS on the System Drive (C:\), resulted in Power Points being presenting as expected.
Installing OWAS on a Non-System Drive, in this case (D:\), resulted in the errors above.
They also said a KB article would be released in the future saying disabling TLS 1.0 wasn’t supported, but didn’t have a time frame. Again, I won’t go into the details of why, but essentially Exchange 2013 can proxy and redirect back to 2007, but 2007 cannot proxy forward to Exchange 2013. When a user whose mailbox still resides on 2007, accesses OWA via the 2013 CAS, they will be redirected back to 2007 via external URL value: https://legacy.domain.com/owa Active Sync – (Proxy) I prefer to force Active Sync to proxy from 2013 to 2007 as some Active Sync devices don’t handle the redirect correctly. Here is the SDP candidate list that Carol sends to Bob in the SIP/2.0 200 OK response: a=candidate:1 706431 .211 55476 typ host a=candidate:1 705918 .211 55477 typ host a=candidate:2 1 tcp-pass 6555135 1.81 54978 typ relay raddr .211 rport 49583 a=candidate:2 2 tcp-pass 6555134 1.81 54978 typ relay raddr .211 rport 49583 a=candidate:3 7679 1.81 52755 typ relay raddr .211 rport 53324 a=candidate:3 7678 1.81 56065 typ relay raddr .211 rport 53325 a=candidate:4 1 tcp-act 7076863 1.81 54978 typ relay raddr .211 rport 49583 a=candidate:4 2 tcp-act 7076350 1.81 54978 typ relay raddr .211 rport 49583 a=candidate:5 1 tcp-act 1684797951 .211 49583 typ srflx raddr .211 rport 49583 a=candidate:5 2 tcp-act 1684797438 .211 49583 typ srflx raddr .211 rport 49583 When Carol receives Bob’s candidate list, she tries to connect directly using this information: 192.168.1.100 (Bob’s real IP) Carol is unable to establish a connection with Bob’s real IP because his IP is non-routable .189 (Bob’s public IP) Carol is unable to establish a connection with Bob’s public IP because Bob’s Home Firewall blocks this traffic 1.80 (Lync Edge1 AV Edge public IP) Carol is unable to connect directly to Lync Edge1’s AV edge interface because hairpin traffic is blocked on the corporate network, and because the 50k port range is blocked inbound on Lync Edge1’s AV public IP.
Which is set to “[email protected]”, which is used for mail flow during coexistence. Introducing Exchange 2013 into an Exchange 2007 environment can be a challenging task. This results in the Edge server to not properly fail over between the internal FE servers in the EE Pool.
I don’t have the entire Verbose log copied, but essentially what we see is Autodiscover finds the user on the Hybrid server, and tries a subsequent Autodiscover lookup based on the users “target Address”. Log Name: Lync Server Source: LS Storage Service Date: 9/18/2015 PM Event ID: 32052 Task Category: (4006) Level: Information Keywords: Classic User: N/A Computer: Lync FE.Description: OAuth STS was properly configured for Storage Service. : 10.0.0.16 When using local Hosts files with DNS LB for the internal EE Pool, the format of the Hosts file must be in the following format, with the FQDN of the internal EE Pool listed on separate lines than that of the FE FQDN: Adding multiple host names within a single line item results in a CNAME value being created in the local DNS cache, that only resolves the first entry listed.
Snooper Traces revealed the following: Async Result:: Set Completed – Completed with unthrown exception Microsoft. 2013 will proxy connections back to 2007 for legacy mailboxes. The Media Relay service on the Edge AV server will attempt to relay the connection using the candidate lists provided by each client.
For Coexistence and interoperability between Exchange 20, these values all need to be changed. NOTE: It should go without saying, but the certificate on the Exchange 2007 server should have been replaced by this time with a certificate that contains legacy. To understand that process, have a look at the following article:
A good article to start with is Exchange 2013 interoperability with legacy Exchange Versions by Michael Van Horenbeeck. A single Exchange 2007 server and a single Exchange 2013 server. So I usually setup some dummy URLs on the 2013 side and test all the connections (OWA, EAS, OA). The DTMF has been negotiated properly as RFC2833 within the SIP signaling, but CUCM is not passing the received DTMF digits from MGCP through the MTP to the SIP trunk properly.