This cumulative update fixes several issues in Skype for Business Server 2015, Front End Server and Edge Server. The version number of this update is 6.0.9319.619.
Note Server-side conversation history in branch site deployments is no longer supported in the March 2016 cumulative update.
Issues that the cumulative update fixes
This cumulative update fixes the following issues:
- KB 4583494 Missed call notification because of wrong handling of SIP header in Skype for Business Server 2019 and 2015
- KB 5005507 "403 forbidden" when sending a SIP REFER request to a federated user in Skype for Business Server 2015
- KB 5005510 Can't escalate a conversation to a conference if LBR is enforced in Skype for Business Server 2015
- KB 5005511 Skype for Business client disconnects every few minutes
- KB 5005513 RTCSrv crashes on all Front End servers in all pools in Skype for Business Server 2015
- KB 5005520 Busy on Busy setting isn't ignored for a Team Call group in Skype for Business Server 2015
- KB 5005522 Can't add a second PSTN call if Mediation Server serves different site gateways in Skype for Business Server 2015
This cumulative update also fixes the issues that were previously listed in the following Microsoft Knowledge Base articles:
- KB 4558385 May 2020 cumulative update 6.0.9319.580 for Skype for Business Server 2015, Front End Server and Edge Server
- KB 4518735 August 2019 cumulative update 6.0.9319.562 for Skype for Business Server 2015, Front End Server and Edge Server
- KB 4505401 July 2019 cumulative update 6.0.9319.559 for Skype for Business Server 2015, Front End Server and Edge Server
- KB 4487979 May 2019 cumulative update 6.0.9319.548 for Skype for Business Server 2015, Front End Server and Edge Server
- KB 4464355 January 2019 cumulative update 6.0.9319.537 for Skype for Business Server 2015, Front End Server and Edge Server
- KB 4340904 July 2018 cumulative update 6.0.9319.534 for Skype for Business Server 2015, Front End Server and Edge Server
- KB 4086059 March 2018 cumulative update 6.0.9319.516 for Skype for Business Server 2015, Front End Server and Edge Server
- KB 4074701 January 2018 cumulative update 6.0.9319.514 for Skype for Business Server 2015, Front End Server and Edge Server
- KB 4036312 December 2017 cumulative update 6.0.9319.510 for Skype for Business Server 2015, Front End Server and Edge Server
- KB 4012621 May 2017 cumulative update 6.0.9319.281 for Skype for Business Server 2015, Front End server and Edge server
- KB 3207506 February 2017 cumulative update 6.0.9319.277 for Skype for Business Server 2015, Front End server and Edge server
- KB 3199093 November 2016 cumulative update 6.0.9319.272 for Skype for Business Server 2015, Front End server and Edge server
- KB 3149227 June 2016 cumulative update 6.0.9319.259 for Skype for Business Server 2015, Front End server and Edge server
- KB 3134260 March 2016 cumulative update 6.0.9319.235 for Skype for Business Server 2015, Front End server and Edge server
- KB 3097645 November 2015 cumulative update 6.0.9319.102 for Skype for Business Server 2015, Front End server and Edge server
- KB 3061059 June 2015 cumulative update 6.0.9319.55 for Skype for Business Server 2015 (Front End server and Edge server)
How to install the update
To install the cumulative update for Skype for Business Server 2015, Front End Server and Edge Server, you must follow the steps that are described in Updates for Skype for Business Server 2015 (KB3061064).
Note The Cumulative Server Update Installer applies all updates for the appropriate server role in one operation.
Prerequisites
There are no prerequisites for installing this cumulative update.
Registry information
To use one of the cumulative updates in this package, you don't have to make any changes to the registry.
Restart requirement
You may have to restart the computer after you apply this cumulative update.
Update replacement information
This cumulative update replaces the May 2020 cumulative update 6.0.9319.580 for Skype for Business Server 2015, Front End Server and Edge Server.
Update package installation information
To apply this cumulative update, you must follow the steps that are described in Updates for Skype for Business Server 2015 (KB3061064) on computers that are running the following server roles:
- Skype for Business Server 2015, Standard Edition server
- Skype for Business Server 2015, Enterprise Edition - Front End Server
- Skype for Business Server 2015, Edge Server
Removal information
Before you uninstall this cumulative update, you must first uninstall all cumulative updates of core components whose version number is 6.0.9319.55 or later before you uninstall the cumulative updates for Skype for Business Server 2015 (Front End server and Edge server) that are at 6.0.9319.55 or a later version. Otherwise, you won't be able to start the RTCSRV service.
To remove both cumulative updates, follow these steps.
Note We recommend that you see the instructions that are described in Updates for Skype for Business Server 2015 (KB3061064) when you remove both cumulative updates.
Open Control Panel, and then select Program.
Select Installed Updates.
Uninstall all updates of core components that are of version 6.0.9319.55 or a later version:
Press and hold (or right-click) Skype for Business Server 2015, Core Components (KB5005359) with version 6.0.9319.619. Then, select Uninstall.
Press and hold (or right-click) Skype for Business Server 2015, Core Components (KB5003605) at version 6.0.9319.606. Then, select Uninstall.
Press and hold (or right-click) Skype for Business Server 2015, Core Components (KB4594637) at version 6.0.9319.598. Then, select Uninstall.
Press and hold (or right-click) Skype for Business Server 2015, Core Components (KB4564307) at version 6.0.9319.591. Then, select Uninstall.
Press and hold (or right-click) Skype for Business Server 2015, Core Components (KB4558384)** with version 6.0.9319.580. Then, select Uninstall.
Press and hold (or right-click) Skype for Business Server 2015, Core Components (KB4518733)** with version 6.0.9319.562. Then, select Uninstall.
Press and hold (or right-click) Skype for Business Server 2015, Core Components (KB4505400)** with version 6.0.9319.559. Then, select Uninstall.
Press and hold (or right-click) Skype for Business Server 2015, Core Components (KB4487978)** with version 6.0.9319.548. Then, select Uninstall.
Press and hold (or right-click) Skype for Business Server 2015, Core Components (KB4492303) with version 6.0.9319.544. Then, select Uninstall.
Press and hold (or right-click) Skype for Business Server 2015, Core Components (KB4464354) with version 6.0.9319.537. Then, select Uninstall.
Press and hold (or right-click) Skype for Business Server 2015, Core Components (KB4340903) with version 6.0.9319.534. Then, select Uninstall.
Press and hold (or right-click) Skype for Business Server 2015, Core Components (KB4075225) with version 6.0.9319.516. Then, select Uninstall.
Press and hold (or right-click) Skype for Business Server 2015, Core Components (KB4074705) with version 6.0.9319.514. Then, select Uninstall.
Press and hold (or right-click) Skype for Business Server 2015, Core Components (KB4036311) with version 6.0.9319.510. Then, select Uninstall.
Press and hold (or right-click) Skype for Business Server 2015, Core Components (KB4012620) with version 6.0.9319.281. Then, select Uninstall.
Press and hold (or right-click) Skype for Business Server 2015, Core Components (KB3207502) with version 6.0.9319.277. Then, select Uninstall.
Press and hold (or right-click) Skype for Business Server 2015, Core Components (KB3199088) with version 6.0.9319.272. Then, select Uninstall.
Press and hold (or right-click) Skype for Business Server 2015, Core Components (KB3149226) version 6.0.9319.259. Then, select Uninstall.
Press and hold (or right-click) Skype for Business Server 2015, Core Components (KB3134259) version 6.0.9319.235. Then, select Uninstall.
Press and hold (or right-click) Skype for Business Server 2015, Core Components (KB3097644) version 6.0.9319.102. Then, select Uninstall.
Press and hold (or right-click) Skype for Business Server 2015, Core Components (KB3090687) version 6.0.9319.72. Then, select Uninstall.
Uninstall the updates for Skype for Business Server 2015 (Front End server and Edge server) that are of version 6.0.9319.55 or a later version:
Press and hold (or right-click) Skype for Business Server 2015, Front End Server (KB5005361)** with version 6.0.9319.619. Then, select Uninstall.
Press and hold (or right-click) Skype for Business Server 2015, Front End Server (KB4558385)** with version 6.0.9319.580. Then, select Uninstall.
Press and hold (or right-click) Skype for Business Server 2015, Front End Server (KB4518735) with version 6.0.9319.562. Then, select Uninstall.
Press and hold (or right-click) Skype for Business Server 2015, Front End Server (KB4505401) with version 6.0.9319.559. Then, select Uninstall.
Press and hold (or right-click) Skype for Business Server 2015, Front End Server (KB4487979) with version 6.0.9319.548. Then, select Uninstall.
Press and hold (or right-click) Skype for Business Server 2015, Front End Server (KB4464355) with version 6.0.9319.537. Then, select Uninstall.
Press and hold (or right-click) Skype for Business Server 2015, Front End Server (KB4340904) with version 6.0.9319.534. Then, select Uninstall.
Press and hold (or right-click) Skype for Business Server 2015, Front End Server (KB4086059) with version 6.0.9319.516. Then, select Uninstall.
Press and hold (or right-click) Skype for Business Server 2015, Front End Server (KB4074701) with version 6.0.9319.514. Then, select Uninstall.
Press and hold (or right-click) Skype for Business Server 2015, Front End Server (KB4036312) with version 6.0.9319.510. Then, select Uninstall.
Press and hold (or right-click) Skype for Business Server 2015, Front End Server (KB4012621) with version 6.0.9319.281. Then, select Uninstall.
Press and hold (or right-click) Skype for Business Server 2015, Front End Server (KB3207506) with version 6.0.9319.277. Then, select Uninstall.
Press and hold (or right-click) Skype for Business Server 2015, Front End Server (KB3199093) with version 6.0.9319.272. Then, select Uninstall.
Press and hold (or right-click) Skype for Business Server 2015, Front End Server (KB3149227) version 6.0.9319.259. Then, select Uninstall.
Press and hold (or right-click) Skype for Business Server 2015, Front End Server (KB3134260) version 6.0.9319.235. Then, select Uninstall.
Press and hold (or right-click) Skype for Business Server 2015, Front End Server (KB3097645) version 6.0.9319.102. Then, select Uninstall.
Press and hold (or right-click) Skype for Business Server 2015, Front End Server (KB3061059) version 6.0.9319.72. Then, select Uninstall.
File information
The global version of this cumulative update uses a Microsoft Windows Installer package to install the cumulative update. The dates and the times for these files are listed in Coordinated Universal Time (UTC) in the following table. When you view the file information, the date is converted to local time. To find the difference between UTC and local time, use the Time Zone tab in the Date and Time item in Control Panel.
After the update is installed, the global version of this update has the file attributes, or a later version of the file attributes, that are listed in the following table:
| File name | File version | File size | Date | Time | Platform |
|---|---|---|---|---|---|
| File_apiem.dll | 6.0.9319.548 | 3,589,680 | 8-Apr-19 | 2:09 | x64 |
| File_busyoptions.am | Not applicable | 12,095 | 31-Mar-17 | 16:20 | Not applicable |
| File_busyoptions.exe | 6.0.9319.619 | 1,038,216 | 25-Jul-21 | 17:51 | x86 |
| File_busyoptionsperf.dll | 6.0.9319.259 | 56,528 | 14-Jun-16 | 7:19 | x64 |
| File_datacollectionperf.dll | 6.0.9319.102 | 58,584 | 28-Oct-15 | 11:43 | x64 |
| File_exumrouting.exe | 6.0.9319.281 | 1,015,488 | 31-Mar-17 | 18:24 | x86 |
| File_gac_microsoft.rtc.server.webinfrastructure.dll | 6.0.9319.591 | 3,803,008 | 1-Jul-20 | 16:24 | x64 |
| File_iimfilter.exe | 6.0.9319.580 | 932,216 | 18-Apr-20 | 9:09 | x86 |
| File_inboundrouting.exe | 6.0.9319.619 | 466,312 | 25-Jul-21 | 17:50 | x86 |
| File_inboundroutingnonaudioscript.xml | Not applicable | 3,142 | 1-Apr-19 | 8:38 | Not applicable |
| File_inboundrulesengine.dll | 6.0.9319.619 | 742,792 | 25-Jul-21 | 17:51 | x86 |
| File_instantur.exe | 6.0.9319.235 | 3,302,584 | 23-Feb-16 | 23:21 | x64 |
| File_interclusterrouting.exe | 6.0.9319.235 | 998,112 | 23-Feb-16 | 23:28 | x86 |
| File_lbrouting.am | Not applicable | 20,725 | 21-Jul-21 | 11:46 | Not applicable |
| File_lbrouting.exe | 6.0.9319.619 | 932,744 | 25-Jul-21 | 17:51 | x86 |
| File_microsoft.liveserver.dlexpansion.dll | 6.0.9319.281 | 524,048 | 31-Mar-17 | 18:13 | x86 |
| File_microsoft.rtc.server.mcufactory.dll | 6.0.9319.281 | 1,081,616 | 31-Mar-17 | 18:13 | x86 |
| File_microsoft.rtc.server.udcadapters.dll | 6.0.9319.537 | 1,184,816 | 29-Oct-18 | 5:48 | x86 |
| File_microsoft.rtc.server.udcadapters.resources.dll.ar_sa | 6.0.9319.259 | 33,088 | 14-Jun-16 | 7:26 | Not applicable |
| File_microsoft.rtc.server.udcadapters.resources.dll.az_latn_az | 6.0.9319.259 | 31,552 | 14-Jun-16 | 7:26 | Not applicable |
| File_microsoft.rtc.server.udcadapters.resources.dll.be_by | 6.0.9319.259 | 33,600 | 14-Jun-16 | 7:26 | Not applicable |
| File_microsoft.rtc.server.udcadapters.resources.dll.bg_bg | 6.0.9319.259 | 34,112 | 14-Jun-16 | 7:26 | Not applicable |
| File_microsoft.rtc.server.udcadapters.resources.dll.ca_es | 6.0.9319.259 | 31,552 | 14-Jun-16 | 7:25 | Not applicable |
| File_microsoft.rtc.server.udcadapters.resources.dll.cs_cz | 6.0.9319.259 | 31,552 | 14-Jun-16 | 7:25 | Not applicable |
| File_microsoft.rtc.server.udcadapters.resources.dll.da_dk | 6.0.9319.259 | 31,040 | 14-Jun-16 | 7:25 | Not applicable |
| File_microsoft.rtc.server.udcadapters.resources.dll.de_de | 6.0.9319.259 | 32,064 | 14-Jun-16 | 7:25 | Not applicable |
| File_microsoft.rtc.server.udcadapters.resources.dll.el_gr | 6.0.9319.259 | 36,672 | 14-Jun-16 | 7:25 | Not applicable |
| File_microsoft.rtc.server.udcadapters.resources.dll.en_us | 6.0.9319.259 | 31,552 | 14-Jun-16 | 7:25 | Not applicable |
| File_microsoft.rtc.server.udcadapters.resources.dll.es_es | 6.0.9319.259 | 31,552 | 14-Jun-16 | 7:25 | Not applicable |
| File_microsoft.rtc.server.udcadapters.resources.dll.et_ee | 6.0.9319.259 | 31,552 | 14-Jun-16 | 7:25 | Not applicable |
| File_microsoft.rtc.server.udcadapters.resources.dll.eu_es | 6.0.9319.259 | 32,064 | 14-Jun-16 | 7:26 | Not applicable |
| File_microsoft.rtc.server.udcadapters.resources.dll.fa_ir | 6.0.9319.259 | 33,600 | 14-Jun-16 | 7:26 | Not applicable |
| File_microsoft.rtc.server.udcadapters.resources.dll.fil_ph | 6.0.9319.259 | 31,552 | 14-Jun-16 | 7:26 | Not applicable |
| File_microsoft.rtc.server.udcadapters.resources.dll.fi_fi | 6.0.9319.259 | 31,552 | 14-Jun-16 | 7:25 | Not applicable |
| File_microsoft.rtc.server.udcadapters.resources.dll.fr_fr | 6.0.9319.259 | 31,552 | 14-Jun-16 | 7:25 | Not applicable |
| File_microsoft.rtc.server.udcadapters.resources.dll.gl_es | 6.0.9319.259 | 31,040 | 14-Jun-16 | 7:26 | Not applicable |
| File_microsoft.rtc.server.udcadapters.resources.dll.he_il | 6.0.9319.259 | 32,064 | 14-Jun-16 | 7:25 | Not applicable |
| File_microsoft.rtc.server.udcadapters.resources.dll.hi_in | 6.0.9319.259 | 38,208 | 14-Jun-16 | 7:25 | Not applicable |
| File_microsoft.rtc.server.udcadapters.resources.dll.hr_hr | 6.0.9319.259 | 32,064 | 14-Jun-16 | 7:26 | Not applicable |
| File_microsoft.rtc.server.udcadapters.resources.dll.hu_hu | 6.0.9319.259 | 32,064 | 14-Jun-16 | 7:26 | Not applicable |
| File_microsoft.rtc.server.udcadapters.resources.dll.id_id | 6.0.9319.259 | 31,040 | 14-Jun-16 | 7:25 | Not applicable |
| File_microsoft.rtc.server.udcadapters.resources.dll.it_it | 6.0.9319.259 | 31,552 | 14-Jun-16 | 7:26 | Not applicable |
| File_microsoft.rtc.server.udcadapters.resources.dll.ja_jp | 6.0.9319.259 | 32,576 | 14-Jun-16 | 7:25 | Not applicable |
| File_microsoft.rtc.server.udcadapters.resources.dll.kk_kz | 6.0.9319.259 | 35,136 | 14-Jun-16 | 7:26 | Not applicable |
| File_microsoft.rtc.server.udcadapters.resources.dll.ko_kr | 6.0.9319.259 | 32,576 | 14-Jun-16 | 7:25 | Not applicable |
| File_microsoft.rtc.server.udcadapters.resources.dll.lt_lt | 6.0.9319.259 | 31,552 | 14-Jun-16 | 7:26 | Not applicable |
| File_microsoft.rtc.server.udcadapters.resources.dll.lv_lv | 6.0.9319.259 | 31,552 | 14-Jun-16 | 7:26 | Not applicable |
| File_microsoft.rtc.server.udcadapters.resources.dll.mk_mk | 6.0.9319.259 | 34,624 | 14-Jun-16 | 7:26 | Not applicable |
| File_microsoft.rtc.server.udcadapters.resources.dll.ms_my | 6.0.9319.259 | 31,552 | 14-Jun-16 | 7:25 | Not applicable |
| File_microsoft.rtc.server.udcadapters.resources.dll.nb_no | 6.0.9319.259 | 30,528 | 14-Jun-16 | 7:25 | Not applicable |
| File_microsoft.rtc.server.udcadapters.resources.dll.nl_nl | 6.0.9319.259 | 32,064 | 14-Jun-16 | 7:25 | Not applicable |
| File_microsoft.rtc.server.udcadapters.resources.dll.pl_pl | 6.0.9319.259 | 32,576 | 14-Jun-16 | 7:26 | Not applicable |
| File_microsoft.rtc.server.udcadapters.resources.dll.pt_br | 6.0.9319.259 | 31,040 | 14-Jun-16 | 7:25 | Not applicable |
| File_microsoft.rtc.server.udcadapters.resources.dll.pt_pt | 6.0.9319.259 | 31,552 | 14-Jun-16 | 7:26 | Not applicable |
| File_microsoft.rtc.server.udcadapters.resources.dll.ro_ro | 6.0.9319.259 | 31,552 | 14-Jun-16 | 7:26 | Not applicable |
| File_microsoft.rtc.server.udcadapters.resources.dll.ru_ru | 6.0.9319.259 | 35,136 | 14-Jun-16 | 7:25 | Not applicable |
| File_microsoft.rtc.server.udcadapters.resources.dll.sk_sk | 6.0.9319.259 | 32,064 | 14-Jun-16 | 7:26 | Not applicable |
| File_microsoft.rtc.server.udcadapters.resources.dll.sl_si | 6.0.9319.259 | 31,552 | 14-Jun-16 | 7:26 | Not applicable |
| File_microsoft.rtc.server.udcadapters.resources.dll.sq_al | 6.0.9319.259 | 31,552 | 14-Jun-16 | 7:26 | Not applicable |
| File_microsoft.rtc.server.udcadapters.resources.dll.sr_cyrl_rs | 6.0.9319.259 | 34,624 | 14-Jun-16 | 7:26 | Not applicable |
| File_microsoft.rtc.server.udcadapters.resources.dll.sr_latn_rs | 6.0.9319.259 | 31,552 | 14-Jun-16 | 7:25 | Not applicable |
| File_microsoft.rtc.server.udcadapters.resources.dll.sv_se | 6.0.9319.259 | 31,040 | 14-Jun-16 | 7:25 | Not applicable |
| File_microsoft.rtc.server.udcadapters.resources.dll.th_th | 6.0.9319.259 | 36,672 | 14-Jun-16 | 7:25 | Not applicable |
| File_microsoft.rtc.server.udcadapters.resources.dll.tr_tr | 6.0.9319.259 | 31,552 | 14-Jun-16 | 7:25 | Not applicable |
| File_microsoft.rtc.server.udcadapters.resources.dll.uk_ua | 6.0.9319.259 | 35,136 | 14-Jun-16 | 7:25 | Not applicable |
| File_microsoft.rtc.server.udcadapters.resources.dll.uz_latn_uz | 6.0.9319.259 | 31,040 | 14-Jun-16 | 7:25 | Not applicable |
| File_microsoft.rtc.server.udcadapters.resources.dll.vi_vn | 6.0.9319.259 | 32,064 | 14-Jun-16 | 7:26 | Not applicable |
| File_microsoft.rtc.server.udcadapters.resources.dll.zh_cn | 6.0.9319.259 | 30,528 | 14-Jun-16 | 7:25 | Not applicable |
| File_microsoft.rtc.server.udcadapters.resources.dll.zh_tw | 6.0.9319.259 | 30,528 | 14-Jun-16 | 7:25 | Not applicable |
| File_outboundrouting.exe | 6.0.9319.619 | 1,134,456 | 25-Jul-21 | 17:50 | x86 |
| File_replicationapp.exe | 6.0.9319.281 | 566,472 | 31-Mar-17 | 18:17 | x86 |
| File_routing.am | Not applicable | 20,096 | 31-Mar-17 | 16:20 | Not applicable |
| File_rtcabattributeindexrules.xml | Not applicable | 40,292 | 23-Oct-15 | 2:15 | Not applicable |
| File_rtcdbsyncagent.dll | 6.0.9319.510 | 378,552 | 10-Nov-17 | 11:07 | x86 |
| File_rtcmrdrv64.sys | 6.0.9319.289 | 244,992 | 4-Mar-21 | 13:27 | x64 |
| File_serveragent.dll | 6.0.9319.537 | 1,114,672 | 29-Oct-18 | 5:48 | x86 |
| File_server_ | 15.1.544.14 | 1,051,696 | 29-Oct-18 | 5:48 | Not applicable |
| File_server_microsoft.rtc.internal.storage.lyss.dll | 6.0.9319.534 | 873,616 | 19-Jun-18 | 4:24 | x86 |
| File_server_rtcaggregate.exe | 6.0.9319.235 | 297,152 | 23-Feb-16 | 23:28 | x86 |
| File_server_rtchost.exe | 6.0.9319.534 | 382,600 | 19-Jun-18 | 4:24 | x86 |
| File_server_rtcsrv.exe | 6.0.9319.534 | 833,680 | 19-Jun-18 | 4:23 | x64 |
| File_sharedlineappearance.am | Not applicable | 18,752 | 23-Oct-15 | 2:16 | Not applicable |
| File_sharedlineappearance.exe | 6.0.9319.559 | 1,025,616 | 21-Jul-19 | 3:48 | x86 |
| File_sharedlineappearance.exe.config | Not applicable | 402 | 23-Oct-15 | 2:16 | Not applicable |
| File_sipstack.dll | 6.0.9319.619 | 6,052,232 | 25-Jul-21 | 17:51 | x64 |
| File_slaperf.dll | 6.0.9319.235 | 56,496 | 23-Feb-16 | 23:21 | x64 |
| File_translationservice.am | Not applicable | 11,980 | 11-Jun-15 | 3:55 | Not applicable |
| File_udcagent.am | Not applicable | 12,797 | 18-May-16 | 4:45 | Not applicable |
| File_udcagent.exe | 6.0.9319.548 | 1,077,296 | 8-Apr-19 | 2:28 | x86 |
| File_wrtces.dll | 6.0.9319.619 | 11,176,824 | 25-Jul-21 | 17:51 | x64 |
References
Learn about the standard terminology that Microsoft uses to describe software updates.
Get the latest cumulative update for Skype for Business Server 2015.