Skype for Business IT Pro topics

Skype For Business SE - persistent Chat

stima — Wed, 29 Oct 2025 09:23:12 GMT

Hello,

maybe someone of you run into the same error and is able to help me on this topic:

we are using SkypeForBusiness only for internal communication

last week we have upgraded SkypeForBusinness 2019 to SE: "SkypeServerUpdateInstaller.exe" run without errors, installed the necessary updates and we were able to upgrade to SE on topology builder and publish the new version.

on the next step we tried to activate persistent chat.

so same procedure for the upgrade: start the update file "PersistentChatUpateInstaller.exe", nothing else to upgrade

the first steps (install new sql instance, configure topology builder, publish the new topology were easy, no issues occured.

but when we start the Deployment Wizard to install the necessary components we received the error:

"File not found trying to install installing c:\programdata\skype for business server\deployment\cache\7.0.2046.0\setup\mgcserver.msi (feature_chat_server)"

my question:

how can we install the necessary roles/components to activate persistent chat.

the file MgcServer.msi couldn't be found on the server, i can't find it on the SkypeForBusinnes 2019 ISO, too.

one version i found, was located on the ISO for SkypeForBusiness 2015 ISO, but this version can't be installed.

Thanks in advance,

best regards,

Markus

SfB 2019 Install Help

IBrokeit — Mon, 22 Sep 2025 11:34:06 GMT

Hey everyone!

Happy Monday! I'm trying to install a handful of on-prem Skype for Business 2019 into a lab environment and I'm falling at the second hurdle when running 'Setup or Remove SfB Server Components'. I'm getting the error: 'Error 0x8007054b (The specified domain either does not exist or could not be contacted) setting launch conditions on DCOM layer during action SetDCOMSecurityEx.
CustomAction CA_SetDCOMSecurity returned actual error code 1603 (note this may not be 100% accurate if translation happened inside sandbox)

Error returned while installing Server.msi(Feature_Server, Feature_HealthAgent), code 1603. Error Message: A fatal error occurred during installation.'

All of the servers are part of the same domain. I can log into the skype servers with a domain account, DNs all seems to be working, nltest commands seem to come back normal.

Things that I've tried:

- Adjusting the COM Security settings for launch and Activation Permission to include RTCUniversalServerAdmins and my admin account to allow local/remote launch, and local/remote activation

- Setting a group policy to allow the group EVERYONE to make remote SAM calls (this seemed to have a broken a lot so reverted... I saw it on an MS forum that fixed it for someone)

- Run the installer as admin, run it w/out admin

- Put the server into a 'staging' area in AD with no policies applied.

Fortunately this same error is happening on all servers, which implies that there is a policy, registry key or some permission that's getting in the way.

Does anyone have any ideas of some other things that I can try?

Thank you!

Edit: I know Skype 2019 is old, I know I should be using something else. I'll be moving to Skype SE in Oct.

How to Remove Skype for Business

sybase54 — Thu, 04 Sep 2025 01:48:06 GMT

Skype for Business currently installs as a packaged product with Microsoft 365 Business Professional desktop apps. The installation does not install Teams as a part of the Microsoft 365 Business Professional desktop apps. Additionally, Skype for Business has its own installation which is separate from Microsoft 365 Business Professional desktop apps installation.

Windows OS: 11 Pro w/ Windows updates.
Issues:

Users are unable to remove Skype for Business from their desktop by clicking “Uninstall” located on the Windows Start menu.
Teams upgrade requires Skype for Business settings to be set manually via the Teams Admin Center.
Using the PowerShell command: uninstall-package 'Microsoft Skype for Business MUI (English) 2016' to remove Skype for Business requires NuGet to be manually installed prior to performing a removal task or does not remove the application at all. The odd thing about this is that the system recognizes that a 2016 edition of Skype for Business exists.
Note: Microsoft Word reads with the following version number: Microsoft 365 MSO (Version 2508 Build 16.0.19127.20082) 64-bit
Granting and then revoking API permissions via Entra Admin center does not separate Skype for Business from the Microsoft 365 Business Professional installation.
Uninstalling Microsoft 365 Business Professional desktop apps only removes the Skype for Business app temporarily until reinstallation occurs.

Modern Auth with Skype for Business 2015

colaguy — Mon, 02 Jun 2025 18:34:03 GMT

Hi,

I was wondering if there any newer documentation on how to setup Modern Auth with Skype For Business 2015? I was reading this article:

https://techcommunity.microsoft.com/blog/skype_for_business_blog/hybrid-modern-authentication-for-skype-for-business/134751

But it points to AppID that doesn't exist in our tenant.

Join Skype for Business Meeting delay

AH2189 — Fri, 22 Mar 2024 18:41:43 GMT

Hi everyone,

I wonder if someone could help me. We‘re using Skype for business OnPrem 2019 and some of our customers complaining about joining meetings.
Sometimes it takes several minutes to let you join a meeting.
Have you ever experienced something like this delays?
We can’t really see anything on the Skype for business server. Could it be related to the hardware itself for example drivers?

Thanks in advance.

Issue with Skype Business Pro and Outlook 2016 Status Synchronization

Stranger666 — Tue, 24 Oct 2023 21:10:06 GMT

Hello, I have the following problem. Skype Business Pro and Outlook 2016 are installed together.

Now, when I have a meeting, I am always shown as online in Outlook to others, and not as busy.

In Skype, I have already checked all the boxes. I have also compared with other users, everything is 1:1.

What else could I do to resolve this issue?

Skype Snap on packages.microsoft.com

dotnetcarpenter — Tue, 17 Oct 2023 16:26:44 GMT

Can we please have Skype for Linux SNAP on packages.microsoft.com/repos/code, so that we can install it via `apt` on Debian derived Linux distributions?

White screen if use local web client in S4B 2019

pavelnagaev — Fri, 13 Oct 2023 07:56:24 GMT

I would like that my users don't use MS CDN and use only local S4B web client .

1. I have a link for meeting https://meet.exchlab.ru/test01/5V854YXZ?sl=1
2. If I follow it I see white screen.

3. But this page a not really empty it has a html code.

4. If I set UseLocalWebConfig to $false, web client S4B is downloaded from MS CDN and works perfect, but I need local client, because not all of my internal users have access to Internet.

Why I see white screen instead of normal web page?

Call made to LyncClient Automation BeginStartConversation, callback not received in certain cases

AlokKulkarni — Wed, 30 Aug 2023 15:02:47 GMT

Hello,

I have observed that when I restart Windows and then Lync client after sleep/ hibernate, then sometimes the callback is not invoked

Here is my code

IAsyncResult ar = LyncClient.GetAutomation().BeginStartConversation(AutomationModalities.InstantMessage, ptcpts, _ModalitySettings, ConversationWindowCreatedCallback, null);

ConversationWindowCreatedCallback is not invoked . Sometimes Lync signout- sigin is required to get it working. This issue is observed in a customer environment not in development environment.

Skype for businesss Sign in event received after a lot of delay after restart from sleep/ hibernate

AlokKulkarni — Wed, 30 Aug 2023 14:51:32 GMT

Hello all,

Issue with my LyncClient is that I have observed a 2/ 3 minutes delay in getting event for SkypeForBusiness SignedIn after restart from sleep/ hibernate.

This issue is not observed on development machine but in customer environment.

I read somewhere that these events are received from SFB server and the delay can be because server takes time to sync the events with the client.

I am registering for the event using following code during app startup

Client.StateChanged += new EventHandler<ClientStateChangedEventArgs>(Client_StateChanged);

Any assistance will be helpful.

Get Routing Group on secondary to well...

Petri-X — Thu, 17 Aug 2023 17:30:49 GMT

Hi,

When running the command

Get-CsPoolFabricState -Verbose -PoolFqdn sfbpool.domain.com -Type Routing

I do get output were all primaries are in one server and secondary role have only three.

Obviously I there is also this:

"...has insufficient secondary replicas..."

I have tried these classics:

- Reset-CsRoutingGroup -ResetType Transient -TargetFqdn primaryFE.domain.com -RoutingGroup...

- Reset-CsRoutingGroup -ResetType Recreate -TargetFqdn primaryFE.domain.com -RoutingGroup...

- Reset-CsRoutingGroup -ResetType Permanent -TargetFqdn primaryFE.domain.com -RoutingGroup...

I have also tried to use the secondary FE FQDN, but none of them seems to help.

I had possibility to even close down the whole pool, and trying to start from quorum loss:

Start-CsPool -PoolFqdn sfbpool.domain.com -QuorumLossRecovery:$rue

But secondary stays without replicas.

Anybody have tiny advice to this?

Unable to create Skype meetings on delegation even though I have the proper rights on Outlook

AlexandreB990 — Thu, 10 Aug 2023 15:12:39 GMT

Hello,

We are facing an issue with one of our infrastructures. Our servers are running Skype 2015 with clients using Skype for Business 2016 on their computers (Don't ask me why, we acquired the clients this way and they don't want to change :D).

For 3 users out of more than 3000, we are experiencing problems with Skype delegation through Outlook when trying to schedule Skype meetings. Every time they attempt to create a Skype meeting for the person they have delegated for, they receive an error stating that they do not have the rights to do so... even though they do.

We have:

Verified the SIP addresses and everything is okay.
Deleted and re-created the sharing, but the issue persists.
MAPI connection on the Skype clients is functioning correctly.
Tested with a new Outlook profile, which worked fine.

If anyone has any ideas, I would greatly appreciate it!!
Thanks a lot

Skype Web Components Server Error

RenierH — Tue, 25 Jul 2023 12:41:55 GMT

Good day all,

Been having a strange issue regarding TLS and Web Components Server Errors since deploying a new single server.

There is currently 2 single servers on the topology and moving a user from one FE server to the other seems to not always work, especially if they are coming via the EDGE server. On most login requests we receive the below errors in the even logs:

{

An unhandled exception was encountered.

Service: WebTicketService, exception details: System.ComponentModel.Win32Exception (0x80004005): The client and server cannot communicate, because they do not possess a common algorithm
at System.Net.SSPIWrapper.AcquireCredentialsHandle(SSPIInterface SecModule, String package, CredentialUse intent, SecureCredential scc)
at System.Net.Security.SecureChannel.AcquireCredentialsHandle(CredentialUse credUsage, SecureCredential& secureCredential)
at System.Net.Security.SecureChannel.AcquireClientCredentials(Byte[]& thumbPrint)
at System.Net.Security.SecureChannel.GenerateToken(Byte[] input, Int32 offset, Int32 count, Byte[]& output)
at System.Net.Security.SecureChannel.NextMessage(Byte[] incoming, Int32 offset, Int32 count)
at System.Net.Security.SslState.StartSendBlob(Byte[] incoming, Int32 count, AsyncProtocolRequest asyncRequest)
at System.Net.Security.SslState.ForceAuthentication(Boolean receiveFirst, Byte[] buffer, AsyncProtocolRequest asyncRequest)
at System.Net.Security.SslState.ProcessAuthentication(LazyAsyncResult lazyResult)
at System.Net.Security.SslStream.AuthenticateAsClient(String targetHost)
at Microsoft.Rtc.Internal.WebServicesAuthFramework.RemoteCertificateResolver.ResolveCertificate(HostAddress hostAddress, Int32 port, ICollection`1 allowedNameList)
at Microsoft.Rtc.Internal.WebServicesAuthFramework.WebTicketRemoteSecurityTokenStore.ResolveAndCache(String key, HostAddress hostName, Int32 port, ICollection`1 allowedNameList)
at Microsoft.Rtc.Internal.WebServicesAuthFramework.WebTicketRemoteSecurityTokenStore.GetSigningTokenByIssuer(HostAddress hostAddress, Int32 port, ICollection`1 allowedNameList)
at Microsoft.Rtc.Internal.WebServicesAuthFramework.WebTicketRemoteSecurityTokenStore.EnsureIssuerSecurityToken(HostAddress machineAddress, Int32 port, ICollection`1 allowedNameList)
at Microsoft.Rtc.Internal.WebServicesAuthFramework.WebTicketKeyStore.EnsureIssuerSecurityToken(Uri issuerUri)
at Microsoft.Rtc.Internal.WebTicketService.WebTicketService.BeginIssueToken(Message rstMessage, AsyncCallback callback, Object state)
at AsyncInvokeBeginBeginIssueToken(Object , Object[] , AsyncCallback , Object )
at System.ServiceModel.Dispatcher.AsyncMethodInvoker.InvokeBegin(Object instance, Object[] inputs, AsyncCallback callback, Object state)
at System.ServiceModel.Dispatcher.DispatchOperationRuntime.InvokeBegin(MessageRpc& rpc)
at System.ServiceModel.Dispatcher.ImmutableDispatchRuntime.ProcessMessage5(MessageRpc& rpc)
at System.ServiceModel.Dispatcher.ImmutableDispatchRuntime.ProcessMessage11(MessageRpc& rpc)
at System.ServiceModel.Dispatcher.MessageRpc.Process(Boolean isOperationContextSet).
Cause: Application error. Please look through the exception details for more information.
Resolution:
Restart the server. If the problem persists contact product support.}

Restart obviously didnt resolve this issue.

Checking the system logs, I see the following schannel errors:

A fatal error occurred while creating a TLS client credential. The internal error state is 10013.

When I checked the TLS settings on the FE (which is where I get all these errors above) with inetcpl.cpl I see that only TLS 1.2 is ticket.

Looking at the EDGE server, there is no apparent error that is causing this.

We just added the new servers to the SRV and A Record DNS entries, so this shouldnt be an issue.

The EDGE has the below schannel errors:
An TLS 1.2 connection request was received from a remote client application, but none of the cipher suites supported by the client application are supported by the server. The TLS connection request has failed.

Not sure if this could cause any issues though as the working environment has the same errors as the above.

Skype starts a "busy phone sound and disconnect sound" in the headphones

BartDB — Fri, 13 Jan 2023 12:13:33 GMT

ello

I got a lot of users who are complaining of a "busy phone sound and disconnect sound" playing in a loop in the headphones (jabra, poly or private). Its start most of the time when coming out of standby( some not), returning from homework, connecting to the dock. There is no clear line in it.

the only way to stop it is to stop skype app and the skype background process. after restarting skype its gone for a while. There are no outgoing calls in the logs. it just plays the sound without stopping

I updated all drivers and firmware of the hardware. All patches are in place.

I can not replicate the trigger or the sound.

Edition Windows 10 Enterprise

Version 20H2

Installed on ‎1/‎06/‎2022

OS build 19042.2364

Experience Windows Feature Experience Pack 120.2212.4190.0

Skype® for Business for Microsoft 365 MSO (Version 2202 Build 16.0.14931.20858) 64-bit

I can not replicate the issue. So can't test it on web.skype. I spend a lot of time of disconnecting replugging everything to trigger it or to stop it. Only killing the app and background process wil stop it. and then it does not come back. Until whatever trigger it

monitor Skype for Business edge servers

sam870 — Thu, 11 Aug 2022 00:22:35 GMT

While we deploy Hybrid setup for Teams with Edge servers on -premise, what all should be monitored from skype for Business edge servers

Lync 2013 with 2016 domain controller

DaveTheTeamsGuy — Thu, 04 Aug 2022 12:04:14 GMT

Is anyone successfully running Lync 2013 server with a 2016 DC in a production environment? Understood that it's unsupported. Asking for a friend.

on wich file will be the delegation setting be saved

Daniel_Saffrin — Wed, 27 Jul 2022 09:53:22 GMT

Our customer has a Citrx enviroment and this environment delete the %localappdata% every night in the User Folder. For a better performance the customer want to leave the skype settings and ask which file contains the delegation settings or which file should be not deleted to have a better performance when the user is going to login.

problems with sending files via Skype from another app (Android)

brian22222 — Wed, 29 Jun 2022 10:18:19 GMT

Hello!

I'm developing an android apps this app has the functionality to send some documents via other apps. The problem is that if I want to share via using Intent my document (document is photos and text), application ignores the text and attaches only photo to the message.

Please help me in solving this problem.

Anyone here still using Snom phones? Incoming call glitch when using Edge Server

jrsmith83 — Wed, 25 May 2022 15:18:22 GMT

I'm noticing a glitch that is happening with our older Snom 710/720/D725 phones, doesn't affect our Audiocodes phones. I believe it is related to STUN / ICE.

When we have an external user that is connecting via our Edge Server (either a remote IP phone or S4B App) and they call an internal extension where the user has a Snom Phone, the audio will drop out after 5-10 seconds. If the internal user with a Snom phone calls that person back, the audio is fine so it is only a one-way issue. Anyone dealt with this issue before?

Skype for business premise USER migration to cloud error

Simon1461355 — Thu, 31 Mar 2022 19:56:16 GMT

I get the following error when I try to move a user to Teams

Move-CsUser -Identity [USER] -Target "sipfed.online.lync.com" -UseOAut

Move-CsUser : Rollback from Unified Contact Store failed for user: with exception: Rollback failed because user was not found or available on the Skype for Business Server..

Any ideas ?