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Hello,
I'm in the middle of doing side by side migration from Lync 2010 to SfB 2015 both in the same site!
I have 2015 FE pool up and running with one user in it.
I have A record in my DNS pointing to one of my servers FE2 IP to my pool name, E.G., "SKP15.domain.local" 10.10.10.32 (FE Number 2 IP).
Here is the scenario:
User2015 - is logged in to SfB 2015 and sees "User2010" as Avalible.
User2010 - is logged in to Lync 2010 and sees "User2015" as Presence unknown.
User2015 - can send only one message to "User2010" and after the first message, it won't send any more.
User2010 - cant send a message at all to "User2015".
I have used SfB debugging tool and found the next error ID - 0x80072746.
I have checked my certificates, and they are valid.
The DNS seems alright as well.
Do you guys have any other suggestions?
Fixed the problem by deleting the A record of the SfB FE pool and creating a new one.
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Thanks for sharing your solution about this issue!
Hi!
Does this issue persist before the migration?
Can users chat and see presence normally in individual Lync 2010 server or Skype for Business?
Do you have any operations before this issue occurred?
In order to narrow down this issue, could you provide detailed error message about error code 0x 80072746?
We recommend you use Lync Connectivity Analyzer(https://testconnectivity.microsoft.com/tests/skype) to check your DNS configuration and other ports on the firewall.
Besides, please check if there is any error message in the front-end server.
For more details about how to migrate Lync 2010 to SFB 2015, you can learn it from:
https://eveningit.com/migrate-from-lync-2010-to-skype-for-business-server-2015/
If the response is helpful, please click "Accept Answer" and upvote it.
Does this issue persist before the migration?
No, I didn't have any issues before in the lync 2010 environment.
Can users chat and see presence normally in individual Lync 2010 server or Skype for Business?
Yes, Lync 2010 users can see the other users in Lync 2010 as available, same goes for SFB 2015, SFB 2015 users can see the other users in SFB 2015 as available.
Do you have any operations before this issue occurred?
No, I just installed the FE servers.
In order to narrow down this issue, could you provide detailed error message about error code 0x 80072746?
TL_ERROR(TF_CONNECTION) [SFB2015POOL\SFB2015FE2SERVER]
$$begin_record
Severity: error
Text: Receive operation on the connection failed.
Local-IP: SFB2015FE2SERVER-IP:49165
Peer-IP: LYNC2010FE2SERVER-IP:5061
Peer: LYNC2010POOL.DOMAIN.LOCAL:5061;MS-FE=LYNC2010FE2SERVER.DOMAIN.LOCAL
Peer-Cert: LYNC2010POOL.DOMAIN.LOCAL (LYNC2010FE2SERVER.DOMAIN.LOCAL)
Connection-ID: 0x1201
Transport: M-TLS
Result-Code: 0x80072746
Data: fqdn="LYNC2010FE2SERVER.DOMAIN.LOCAL:5061";tls-target="LYNC2010POOL.DOMAIN.LOCAL";ip-address="LYNC2010FE2SERVER-IP";peer-type="InternalServer";winsock-code="10054";winsock-info="The peer forced closure of the connection"
$$end_record
We recommend you use Lync Connectivity Analyzer(https://testconnectivity.microsoft.com/tests/skype) to check your DNS configuration and other ports on the firewall.
I don't have a firewall between the pools.
Besides, please check if there is any error message in the front-end server.
No, I didn't find any, only the error mentioned above that I've found through the debugging tools.
For more details about how to migrate Lync 2010 to SFB 2015, you can learn it from:
https://eveningit.com/migrate-from-lync-2010-to-skype-for-business-server-2015/
Thanks.