Got some weird errors on our new Skype for Business server install. After a straight forward install users was unable to login from external and some issues regarding conferences. Skype services seemed to start but ended up running with unknown details when get-windowsservices. Also we had one error in the eventviewer on frontende server.
The most important clue was : CA_Failure: InternalError . So this pointed towards a certificate error. What could be wrong with the CA server (A windows server 2016 Enterprise Root CA).
Encryption key lengths of 1024, 2048, and 4096 are supported. Key lengths of 2048 and greater are recommended.
The default digest, or hash signing, algorithm is RSA. The ECDH_P256, ECDH_P384, and ECDH_P521 algorithms are also supported.
Once again check CA configuration:
This CA was installed with the ECDSA_P256 CSP, We did not have the option to reinstall/migrate the CA to a supported version, so our workaround was to install a new standalone CA using RSA256 CSP and use this CA to issue certificates for Edge server internal and frontend certificate. (We published the new CA public key to clients using GPO).
After we assigned the new certificates and rebooted it all seems to work OK. The new certs are now RSA256
To see information stored in SfB addresslist you can dump its content to a text file:
C:\Program Files\Skype for Business Server 2015\Server\Core>abserver -dumpfile “\\\1-WebServices-1\ABFiles\00000000-0000-0000-00 00-000000000000\00000000-0000-0000-0000-000000000000\f-195a.lsabs” c:\temp\sdump.txt
Have done several upgrades from Lync 2013 to Skype for Business 2015, so this last one should be no different, but faith had other plans.
Installed topology builder on a new computer and prepared the upgrade process. But when a bit into the upgrade it failed.
Error: Error returned while installing OcsCore.msi(Feature_LocalMgmtStore), code 1603. Error Message: A fatal error occurred during installation. For more details please consult log at C:\Users\paupav\AppData\Local\Temp\Add-OcsCore.msi-Feature_LocalMgmtStore-[2018_10_17][14_05_11].log
As most people know a MSI error of 1603 tells us as much as “An error occurred”. Tried do some reboots and retried, but nothing helped. With no idea of what could possibly be wrong, I was browsing for ideas or hints the usual places: Eventviewer, Windows explorer (free diskspace, files and folders), services, policies, and finally windows update settings and history. One clue (except that is was error 1603) there was 1 SfB update installed (probably because I selected the installer to check for updates). Thougt it was strange that there should be one update since I has not yet managed to install any SfB software.
So simple. Uninstalled the update , rebooted and the upgrade from now on went flawless.
This event started to appear every 20 seconds or so. The Skype for Business servers had recently been patched. In the patch list was updates to .Net framework. Included in these patches is a security update that resolves an security bypass feature. https://support.microsoft.com/en-us/help/4014510/description-of-the-security-and-quality-rollup-for-the-net-framework-4 . To solve this all I had to do was add the required registry key : HKEY_LOCAL_MACHINE\Software\Microsoft\.NETFramework\v4.0.30319 – DWORD: RequireCertificateEKUs=0 and restart the “Skype for Business Server Web Conferencing” service. The fix can be applied to Lync server 2013 as well.
Was installing a Skype for Business server the other day, and the simple task of preparing the forest failed. I am always on the alert when doing Active Directory forest wide tasks as prepare schema and prepare forest, so it is not fun to see error messages during these tasks.
What now. It is no good feeling to see “Unrecoverable” and “You cannot retry this operation”. But I had to retry, and then there was a slight different error message.
I’ve had errors before, and at those cases the simple thing to do was to change from “Local domain” to “Domain FQDN” in the “Universal Group Location” dialog box.
This time there was nothing but lots of scary errors.
I know this domain has several trusts configured, so it looks like the wizard get confused of where to put these groups. Next step was to run prepare forest from PowerShell so that I was able to provide all this information to the command.
After you install KB3101496 missed phone calls are no longer displayed in Lync 2013/Skype. All other Lync functionality is ok. You will be notified about missed conversation and conversation. The only thing that I have noticed is that missed phone calls are not appearing in the list. After uninstalling this update everything went back to normale.
(UPDATED) After we installed the Latest Lync server 2013 security fix (Security Update for Lync Server 2013 Web Components Server KB3080353) we have had severeal issues where users where unable to sign in to Lync. This was the server complaining about the client certificate , normally it is the client complaining about the server certificate.
Particulary users homed on VDI or Citrix /RDS and also some CommonareaPhones where affected. Inspecting the client log from a user login revealed :
There was an error communicating with the endpoint at ‘https://lyncserver.domain.local/WebTicket/WebTicketService.svc/mex’.
The server returned HTTP status code ‘500 (0x1F
09/18/2015|11:34:46.551 46A8:461C INFO :: CUccPlatform::WriteStreamToLog:
09/18/2015|11:34:46.551 46A8:461C INFO :: 4)’ with text ‘Internal Server Error’.
The server was unable to process the request.
Latest issue was kind of a puzzle. When one organization sent Skype meeting invitation to another organization it was impossible to click on the meeting in the schedule tab of Skype/Lync.
“Join” functionality missing from sceduler tab in Skype or Lync.
Right click on the meeting gave nothing. The links in Outlook and OWA did work thoe. At first we thought it was something wrong with the client installation, but several reinstalls and updates later the conclution was that there had to be something wrong with the calendar entry.
I’m trying to installing a solution by Acano to integrating different AV conferencing solutions with Lync. Installing it in a split server solution (one edge server in DMZ and one core server in server LAN). Will post the final howto guide when it is installed, as I think the documentation is not that well explained.
Tried to install S4B server 2015 in my lab. Tried this from a computer with no internet access, also I did not install any prerequisites.
“Error: Prerequisite installation failed: Prerequisite installation failed: SqlInstanceRtc For more information, check your SQL Server log files. Log files are in the folder C:\Program Files\Microsoft SQL Server\MSSQL*.Rtc\MSSQL\Log, where the * represents your SQL Server version number. For example, SQL Server 2012 uses this path: C:\Program Files\Microsoft SQL Server\MSSQL11.Rtc\MSSQL\Log.”