I have a working Lync 2010 system, consisting of two Windows 2008 R2 SP1 servers, LYN01 the Front end, and LYN02, the edge. External access, federation, two-party messaging, presence etc all works just fine. What fails is any attempt to invite a third person into a two party conversation. When I do this, I get the message "The Conferencing Service did not respond. Please wait" within the Lync client.

Can anyone advise?, even just some help on where logging info is kept would be useful!

Thanks, Peter

 

I turned on Lync client logging, and got the following interesting info, which finally says "No MCU Factory Available" - what the heck is the MCU factory?

=================

 

A SIP request made by Communicator failed in an unexpected manner (status code 80ef025b). More information is contained in the following technical data:
 
 RequestUri:   sip:Peter.Moreton@acme.org.uk;gruu;opaque=app:conf:audio-video:id:R144Q0W1
From:         sip:peter.moreton@acme.org.uk;tag=84f848a6bf
To:           sip:Peter.Moreton@acme.org.uk;gruu;opaque=app:conf:audio-video:id:R144Q0W1;tag=EB2CB0D8F3501021BF64C1175CC967BE
Call-ID:      dc21fe48c73147c786e6205f1f34c552
Content-type: multipart/alternative;boundary="----=_NextPart_000_1C2F_01CC0B05.F9F189C0";call-type=audiovideo

------=_NextPart_000_1C2F_01CC0B05.F9F189C0
Content-Type: application/sdp
Content-Transfer-Encoding: 7bit
Content-ID: <b236f6cbe2eb4dedba8648fcb00ea6b7@acme.org.uk>
Content-Disposition: session; handling=optional; ms-proxy-2007fallback

v=0
o=- 0 0 IN IP4 172.23.136.22
s=session
c=IN IP4 172.23.136.22
b=CT:99980
t=0 0
m=audio 10238 RTP/AVP 114 9 112 111 0 8 116 115 4 97 13 118 101
a=candidate:DpPgwRYqpEsMSRXkcL0CI3E8bZFt/MR9LYesTZes7pE 1 +PF7yT2Rs4b4M/UvvjIEMA UDP 0.830 192.168.56.1 21526
a=candidate:DpPgwRYqpEsMSRXkcL0CI3E8bZFt/MR9LYesTZes7pE 2 +PF7yT2Rs4b4M/UvvjIEMA UDP 0.830 192.168.56.1 21527
a=candidate:CWVrvOij1l0zVer+GSvVjFL+85gIi1ytZH8xhgSb38U 1 HISDkpq4/8HkJ4DuDoh7rw UDP 0.840 192.168.139.1 19292
a=candidate:CWVrvOij1l0zVer+GSvVjFL+85gIi1ytZH8xhgSb38U 2 HISDkpq4/8HkJ4DuDoh7rw UDP 0.840 192.168.139.1 19293
a=candidate:PEiTWe3vsRzz37MXmw8GIZnKqDmPhq4xvBsTN/LhRwk 1 klhngYPWlITM/OreS/38WQ UDP 0.850 192.168.91.1 29730
a=candidate:PEiTWe3vsRzz37MXmw8GIZnKqDmPhq4xvBsTN/LhRwk 2 klhngYPWlITM/OreS/38WQ UDP 0.850 192.168.91.1 29731
a=candidate:9m768FBc5MmcgNmCtp+qnvmYw1hF5FacsQjZznOPPC8 1 nKCbhJMxpazcs2JXxjChTQ UDP 0.860 172.23.136.22 10238
a=candidate:9m768FBc5MmcgNmCtp+qnvmYw1hF5FacsQjZznOPPC8 2 nKCbhJMxpazcs2JXxjChTQ UDP 0.860 172.23.136.22 10239
a=candidate:sdNSHY58DMbyFJX9qpOszKURZ0ujaY22uufwq9yo0WY 1 XPQ4PdumH/44Ze6FLIo/eg TCP 0.190 85.118.19.29 53118
a=candidate:sdNSHY58DMbyFJX9qpOszKURZ0ujaY22uufwq9yo0WY 2 XPQ4PdumH/44Ze6FLIo/eg TCP 0.190 85.118.19.29 53118
a=candidate:mYpqLAf+7vVW0qVNTQIn5kutVtxMCP/KESuGl/iMU3k 1 AW68x+qOHHVR8T5yJKt7Nw UDP 0.490 85.118.19.29 57676
a=candidate:mYpqLAf+7vVW0qVNTQIn5kutVtxMCP/KESuGl/iMU3k 2 AW68x+qOHHVR8T5yJKt7Nw UDP 0.490 85.118.19.29 56794
a=candidate:TwiWJFXQjLberrxWBj93Um5Yi0hK6ood52qEhJZi2W4 1 v4m4e1nsUxlG61iKYB8aEA TCP 0.250 172.23.136.22 29527
a=candidate:TwiWJFXQjLberrxWBj93Um5Yi0hK6ood52qEhJZi2W4 2 v4m4e1nsUxlG61iKYB8aEA TCP 0.250 172.23.136.22 29527
a=cryptoscale:1 client AES_CM_128_HMAC_SHA1_80 inline:7S9LTx8PnauAPlJ3g5Fykt28aZ6Akz4YbxbOmaUE|2^31|1:1
a=crypto:2 AES_CM_128_HMAC_SHA1_80 inline:/0zyG/nmzgRkhPxWIKVAmdOrcPchr+9pKyEU5MpM|2^31|1:1
a=crypto:3 AES_CM_128_HMAC_SHA1_80 inline:cKvO64LLVQGrwlTI4D+hJz8nZ+geipIaI/XsDin5|2^31
a=maxptime:200
a=rtpmap:114 x-msrta/16000
a=fmtp:114 bitrate=29000
a=rtpmap:9 G722/8000
a=rtpmap:112 G7221/16000
a=fmtp:112 bitrate=24000
a=rtpmap:111 SIREN/16000
a=fmtp:111 bitrate=16000
a=rtpmap:0 PCMU/8000
a=rtpmap:8 PCMA/8000
a=rtpmap:116 AAL2-G726-32/8000
a=rtpmap:115 x-msrta/8000
a=fmtp:115 bitrate=11800
a=rtpmap:4 G723/8000
a=rtpmap:97 RED/8000
a=rtpmap:13 CN/8000
a=rtpmap:118 CN/16000
a=rtpmap:101 telephone-event/8000
a=fmtp:101 0-16
a=encryption:optional

------=_NextPart_000_1C2F_01CC0B05.F9F189C0
Content-Type: application/sdp
Content-Transfer-Encoding: 7bit
Content-ID: <afd6e1f33a9c4ad485bb9a55cc1bf467@acme.org.uk>
Content-Disposition: session; handling=optional

v=0
o=- 0 0 IN IP4 172.23.136.22
s=session
c=IN IP4 172.23.136.22
b=CT:99980
t=0 0
m=audio 16452 RTP/AVP 114 9 112 111 0 8 116 115 4 97 13 118 101
a=ice-ufrag:rORg
a=ice-pwd:YN97WrBINeFDgv5fqWfNCK/L
a=candidate:1 1 UDP 2130706431 172.23.136.22 16452 typ host
a=candidate:1 2 UDP 2130705918 172.23.136.22 16453 typ host
a=candidate:2 1 UDP 2130705919 192.168.91.1 18918 typ host
a=candidate:2 2 UDP 2130705406 192.168.91.1 18919 typ host
a=candidate:3 1 UDP 2130705407 192.168.139.1 12322 typ host
a=candidate:3 2 UDP 2130704894 192.168.139.1 12323 typ host
a=candidate:4 1 UDP 2130704895 192.168.56.1 12270 typ host
a=candidate:4 2 UDP 2130704382 192.168.56.1 12271 typ host
a=candidate:5 1 TCP-PASS 6556159 85.118.19.29 56355 typ relay raddr 172.23.136.22 rport 32497
a=candidate:5 2 TCP-PASS 6556158 85.118.19.29 56355 typ relay raddr 172.23.136.22 rport 32497
a=candidate:6 1 UDP 16648703 85.118.19.29 55359 typ relay raddr 172.23.136.22 rport 3444
a=candidate:6 2 UDP 16648702 85.118.19.29 57390 typ relay raddr 172.23.136.22 rport 3445
a=candidate:7 1 TCP-ACT 7075327 85.118.19.29 56355 typ relay raddr 172.23.136.22 rport 32497
a=candidate:7 2 TCP-ACT 7074814 85.118.19.29 56355 typ relay raddr 172.23.136.22 rport 32497
a=candidate:8 1 TCP-ACT 1684796415 172.23.136.22 32497 typ srflx raddr 172.23.136.22 rport 32497
a=candidate:8 2 TCP-ACT 1684795902 172.23.136.22 32497 typ srflx raddr 172.23.136.22 rport 32497
a=cryptoscale:1 client AES_CM_128_HMAC_SHA1_80 inline:7S9LTx8PnauAPlJ3g5Fykt28aZ6Akz4YbxbOmaUE|2^31|1:1
a=crypto:2 AES_CM_128_HMAC_SHA1_80 inline:/0zyG/nmzgRkhPxWIKVAmdOrcPchr+9pKyEU5MpM|2^31|1:1
a=crypto:3 AES_CM_128_HMAC_SHA1_80 inline:cKvO64LLVQGrwlTI4D+hJz8nZ+geipIaI/XsDin5|2^31
a=maxptime:200
a=rtpmap:114 x-msrta/16000
a=fmtp:114 bitrate=29000
a=rtpmap:9 G722/8000
a=rtpmap:112 G7221/16000
a=fmtp:112 bitrate=24000
a=rtpmap:111 SIREN/16000
a=fmtp:111 bitrate=16000
a=rtpmap:0 PCMU/8000
a=rtpmap:8 PCMA/8000
a=rtpmap:116 AAL2-G726-32/8000
a=rtpmap:115 x-msrta/8000
a=fmtp:115 bitrate=11800
a=rtpmap:4 G723/8000
a=rtpmap:97 RED/8000
a=rtpmap:13 CN/8000
a=rtpmap:118 CN/16000
a=rtpmap:101 telephone-event/8000
a=fmtp:101 0-16
a=encryption:optional

------=_NextPart_000_1C2F_01CC0B05.F9F189C0--

Response Data:

603  Decline
ms-diagnostics:  3098;reason="No MCU Factory Available";source="SRVCENLYN01.acme.org.uk";OriginalPresenceState="0";CurrentPresenceState="0";MeInsideUser="Yes";ConversationInitiatedBy="0";SourceNetwork="0";RemotePartyCanDoIM="No"

 
 Resolution:
 If this error continues to occur, please contact your network administrator. The network administrator can use a tool like winerror.exe from the Windows Resource Kit or lcserror.exe from the Office Communications Server Resource Kit in order to interpret any error codes listed above.

OK, I found the solution.

For testing, I had used a public wildcard SSL certificate on the Front-end server. Replacing this with a public SSL  certificate (with all the correct SAN's) fixes the issue. Wildcard SSL's *seem* to work, but don't.

Peter Moreton

• Marked as answer by Peter Moreton Thursday, May 05, 2011 2:11 PM

Hi, can you please help me  with the steps to solve this problem. i'm new to lync, and also recieves this error on the client: "The conference service did not respond. Please wait and try again.

(When contacting your support team, reference error ID 3098 (source ID 243). 

Troubleshooting information is available online, including best practices for using Lync.)

 

Buad Annang

Buad,

In my case, the error is fixed by studiously implementing the correct SSL certificates, and in particular ensure that you have purchased a full public SSL certificate for your Edge server and not wildcard ones or one issued from a private Certificate Authority.

Regards, Peter

I spent a few days troubleshooting this "No MCU Factory" error.  This link saved me - http://itknowledgeexchange.techtarget.com/it-rant/conferencing-server-did-not-respond-error-with-lync/.  Cheers.

I was do it, but my Lync chat still not working... have any solutions for this problem?

How did you do that? I am newer to certificates and don't know how to do this and the only solutions for this problem I keep finding lead me right back to this post.