[Product update] Infrastructure Analysis Tool is now available with Business Accounts.Learn More


Microsoft Lync Server





Microsoft Lync Server (renamed Skype for Business Server in 2015) is a real-time communications server software that provides infrastructure for enterprise instant messaging, presence, VoIP, ad hoc and structured conferences (audio, video, and web), and PSTN connectivity through a third-party gateway or SIP trunk. These features are available within and between organizations, and with external users on the public internet or standard phones (on bpth PSTN and SIP trunking).

Share tech news, updates, or what's on your mind.

Sign up to Post

Hi Experts,

I do have a user in my organization [SFB on prem] with several FE servers and MBX in a DAG 2016 with an unknown presence status on IM

Troubleshooting done so far

I remote into user’s PC, clear SFB cache client, outlook profile recreated, delete OAB files, reboot computer, no luck
User tried from another computer, same thing.
Fixed the discrepancy with SIP proxy address attribute
Any ideas?  What I missed here? Her account was updated yesterday, so OAB replication should not be an issue here.
10 Tips to Protect Your Business from Ransomware
10 Tips to Protect Your Business from Ransomware

Did you know that ransomware is the most widespread, destructive malware in the world today? It accounts for 39% of all security breaches, with ransomware gangsters projected to make $11.5B in profits from online extortion by 2019.


I need little help with renewing 3rd party certificate on Skype for Business 2015 server.
As per pictures attached, i want to renew only that certificate (SIP, since it is 3rd party and all others are from internal CA), and when i go to Request with Advanced option, and populate everything i end up with csr, that has a common name of webdir.<domain>.com, in stead of sip.<domain>.com (as it is atm).

So, the question is how to renew this certificate but to have CN of sip.<domain>.com, when there is no option to define CN?

Can I use maybe exchange server, generate CSR there, then just delete it after i get new cert, or something like that?


I have been presented with a problem. I have been requested to add a custom Active Directory attribute value to all Lync contact Cards. A large number of managers that have Active directory accounts have the custom attribute "secretary" along with the value OU location to their secretaries Active Directory Object. . Can that Active Directory custom attribute (called secretary) be updated in Lync Server 2010 and reflected on the Skype for Business contact Card? Can the ABS Configuration Tool be used for this task can a custom attribute be added to it.
Current State:
1 Forest/1 Domain
AD Connect to Office 365 (syncing password hashes)
All on-premises Lync and Exchange servers have been decommissioned in the environment

Most users have attributes like this populated - looks like this from old on-premises (However, many are synced to 365):

Q: Can I clear the above attributes without issue?

The reason I ask is I would like to clear the above attributes when I implement the following changes (which is the actual project at hand):

UserPrincipalName attribute    
from foo@contoso.com to foo@fabrikam.com

Mail attribute    
from foo@contoso.com to foo@fabrikam.com

ProxyAddresses attribute - the PrimarySMTPAddress
from SMTP:foo@contoso.com to SMTP:foo@fabrikam.com

ProxyAddresses attribute - the old PrimarySMTPAddress will become the secondary
from SMTP:foo@contoso.com to smtp:foo@contoso.com

ProxyAddresses attribute - the SIP Address
from SIP:foo@contoso.com to SIP:foo@fabrikam.com
Hello Experts

I have a question concerning Lync Hybrid with O365 DNS record

I working with a client and this is the current configuration of his public dns:

access  A IP Adress of EDGE Server

_sip._tls.mydomain  SRV access.mydomain   0 0 443 access.mydomain
_sipfederationtls._tcp.mydomain           0 0  5061 access.mydomain

While reading a couple of documents i read about a sip entry instead . like here : http://blog.insidelync.com/2016/08/dns-records-in-a-skype-for-business-hybrid-deployment/

 so for my Hybrid setup to work DNS wise should i recreate all in sip or  i should

sip A IP Adress Edge Server

_sip._tls.mydomain  SRV sip.mydomain   0 0 443 sip.mydomain
_sipfederationtls._tcp.mydomain           0 0  5061 sip.mydomain
Hello Team

I have a client who has Lync 2013 On premisses and he is migrating to Office 365 . I want to know if there is any means to have an Office 365 User to add Contacts that are sitting on the On premises servers?

Is it possible and how can we achieve that?

I want to mention that the client was using this Lync 2013 just for Internal communication


Cannot access EWS from some operating systems in a hybrid 365 deployment.

-      365 Hybrid environment deployed via on prem Exchange 2016 servers
-      Exchange 2010 still used by majority of organisation
-      Lync 2013 deployed on prem, latest CU
-      365 migrated, Windows 10 based users have full access to call history, voicemail and their meeting tab via EWS
   o      Does not work when they login on a Windows 7 client
-      365 migrated, Windows 7 based users cannot access EWS
-      User homed on Exchange 2016 server cannot access EWS
-      User homed on Exchange 2010 server can access EWS when _autodiscover._tcp.business.com is set to the Exchange 2010 CAS, breaks when set to 2016 server
-      Office version is 2016, latest patches applied
-      Kemp Virtual Loadmasters used at both sites

Things tried

-      Logged call with Microsoft 63 days ago…
-      _autodiscover._tcp.business.com
   o      Set to Exchange 2016 directly, breaks Win 7 based users homed on Exchange 2010 access to EWS
   o      Set to Exchange 2010, Win 10 based users homed on 365 fine, majority of org fine as still homed here, 365 migrated Win 7 users can’t access EWS
-      Checked virtual directories for EWS
-      Checked certificate assigned to Kemp Loadmaster
-      Checked firewall rules to ensure connectivity and no dropped traffic
-      Configured OAUTH between Exch 16 and Exch Online at MS request, did nothing
We are setting up Skype for Business 2015.
In the boardroom I have setup a Laptop with Windows 10 Pro and Skype for Business to be used for Video Conferencing. I have attached a Logitech BCC950 Conference Cam to the laptop. When looking at the Preview in Video settings, you can get a stream from the camera. Once you connect a video call you get the message "Could not start Video: Your camera is not setup or you are already using it."
There are no other applications that could be using the Camera.

I have tried the following:
  1. Updated the driver to the latest that Windows updates can find as Logitech does not supply updates on their website.
  2. Installed all Windows updates.
  3. Changed USB ports. These are only USB 2.0 ports.
  4. Tried a different computer with the same setup but have the same issues.

Can anyone help?

Thanks in advance.
We use Ken's Skypeoptimzer site to create our dialing rules. we've used failover routing in the same site for this.

unfortunately an unintended result is: any external inbound call to one of our users which has simring enabled, results in the sim ring leg of the call going out via our second SIP trunk and not through the same trunk as the inbound call. this becomes an issue since our Secondary 'failover' trunk is infact a pstn gateway which cannot pass the original calling parties call id on the outbound call id of the simring portion of the call.

we do have an sbc which we can add the pstn gateway to (the same one which controls the primary SIP Trunk), the issue is this would introduce a single point of failure into the call path.

has anyone successfully managed to deal with this issue?
how Skype for business works, what are the requirements for setting up

general issues we encounter
Big Business Goals? Which KPIs Will Help You
Big Business Goals? Which KPIs Will Help You

The most successful MSPs rely on metrics – known as key performance indicators (KPIs) – for making informed decisions that help their businesses thrive, rather than just survive. This eBook provides an overview of the most important KPIs used by top MSPs.


I am migrating to Office 365 (Businsess Premium) from Exchange (2010 SP3 RU16).  We need to disable Unified Messaging for user syncing to work properly.  We can only have Unified Messaging for users that have plans with E3 or above.  Unfortunately users with UM disabled have no voicemail now.  Voicemail to our phone (Polycom VVX 400 and CX600) is now disabled, the phone will ring and calls can be answered but if you are not there to pick up, the call just ends or disconnects after 20 seconds or so, no voicemail option for the caller.  We have on prem Lync/Skype for Bus 2013  that is most likely needing a configuration change to resolve this.  Any help would be great!!
User wants to forward contact ceneter voicemails (separate VOIP Sysem) to xxx@domain.com,  email ID and then forward it to two different email ID

So I have informed it is not possible to forward voicemails from one mailbox to another.

So I have suggested to create shared mailbox and add the users to shared mailbox , who and all wants to monitor voicemails. Then configure shared mailbox in user outlook. So they can monitor the voicemails.

But requester don’t want to create new mailbox in their outlook. For her voicemails has to directly go to users inbox.

SO my question is can we send voicemails to DL’s. Like our team DL?
User has provided the shared mailbox ID xx@domain.com. And we have configured the voicemail for the same.
we want the voice mail to be converted to text.

is there any we need to configure from unified messaging server
or shared voice mail box
Currently default message is playing.
User has provided the shared mailbox ID xx@domain.com. And we have configured the voicemail for the same.

Currently default message is playing. Is it possible to change the recording for this mail ID from user side or is it require to do it on voicemail server?
can we configure  a shared mailbox for voice mail.?

we have exchange 2010 sp3

so that specific IVR recording can be played
I need to know about functioning of lync2013 architecture, what are the components involved and their functioning.

Any documents on how to troubleshoot lync issues in general

Is there any good article which can help me understand and have a better clarity

for ex. how lync for business when we chat or in conference call how it is linked with outlook
We are getting skype authentication prompt upon login. Beside entering the login credentials these prompts keeps appearing again.

We are using Lync 2013 (15.0.4953.100) 32-bit.

Upon searching for Microsoft update patches (http://support.microsoft.com/kb/2825630) for Lync 2013 I found a patch which is required to fix the issue but as I try to install the patch which seem not installed already i get below error message. Not sure why the patch fails to find the installed application?


I have parent domain : contoso.com and one child domaine : ukie.contoso.com
First, I can't create user from control panel for users located in child domain

Error: “Active Directory operation failed on “Domain Controller”. You cannot retry this operation: “Insufficient access rights to perform the operation”.

Then I can create the user with powershell.

When I try to connect my user on skype client, I have this error: You didn’t get signed in. It might be your sign-in address or logon credentials, so try those again. If that doesn’t work, contact your support team.

And error from log (attached file)

And here result when I try to test connectivity:

Test-CsRegistration -targetfqdn lyncpoolfe01.contoso.com -usercredential $cred1 -usersipaddress sip:ccharles@contoso.com

Target Fqdn   : lyncpoolfe01.contoso.com
Result        : Failure
Latency       : 00:00:00.0009741
Error Message : The log on was denied. Check that the proper credentials are
                being used and the account is active.
                Inner Exception:NegotiateSecurityAssociation failed, error:

Diagnosis     :

Open in new window

Why my child users can't connect to skype on parent domain? Should I perform actions, like prepare ad or forest for this child domain?

Thanks in advance
I am trying to add another Enterprise FE Server 2012 R2 64 Bit to the Pool. While using the deployment wizard, I get the error that KB2982006 is needed. After obtaining and downloading from MS, while installing, I get the error "The update is not applicable to your computer". Research shows I need to install prerequisite updates such as KB2919442. But when I try to, I get same error for that update as well. See attachment. This machine currently has over 200 updates on it. Have anyone seen this?
Get Cisco Certified in IT Security
Get Cisco Certified in IT Security

There’s a high demand for IT security experts and network administrators who can safeguard the data that individuals, corporations, and governments rely on every day. Pursue your B.S. in Network Operations and Security and gain the credentials you need for this high-growth field.

i have Asterisk server running on two servers as Active/Active with 1000 Clients.Now we have configured the Lync Server i need step by step Guidelines for moving the clients from Asterisk to the Microsoft Lync with same extensions and dial plan.
If you are using MS Lync to make a phone call to the PSTN and there are multiple SIP trunks to the PSTN (actually these are trunks to Cisco CUCM and then on to PSTN from there) - how does Lync decide which SIP Trunk to use?
When a user dials in to a conference, they are prompted to enter the conference ID followed by pound.  When they do they system doesn't recognize they are entering the conference ID and the auto attendant states either that it did not get that or that the conference ID is invalid.
This is not with all phones but it is consistent on the ones that it does not work.
This is a three server frontend pool with a ACME Packet SBC and Mitel switches.
It was working perfectly then suddenly this started happening.
What might be causing this?
We have decided to use an F5 rather than the TMG (Threat Management Gateway).  After doing this external users now constantly get "Exchange needs your credentials" error.  Also my picture no longer appears.lync-cred-error.PNG
We are using Exchange 2010.
Happy Tuesday All,

I am running Microsoft Exchange 2013 and I was wondering how I check to see if I have the licenses to run Microsoft Lync.  I was told that my predecessor confirmed we do, but I don't know how to check this.  I am correct in saying that you need to purchase separate licenses for running Lync in your Exchange environment, right?

Thank you!
I am running into an issue when migrating users to Skype for Business Online from my on-prem Lync 2013 server... Hybrid environment.

Can anyone shoot me a command/powershell to run against Skype for Business Online to pull all user information?

Im looking for the Username,DisplayName and most importantly the "directory status".

Im looking to troubleshoot accounts I cant migrate across because they show up as "In Cloud" instead of "synced and homed online".

Thanks in advance.

Microsoft Lync Server





Microsoft Lync Server (renamed Skype for Business Server in 2015) is a real-time communications server software that provides infrastructure for enterprise instant messaging, presence, VoIP, ad hoc and structured conferences (audio, video, and web), and PSTN connectivity through a third-party gateway or SIP trunk. These features are available within and between organizations, and with external users on the public internet or standard phones (on bpth PSTN and SIP trunking).

Top Experts In
Microsoft Lync Server