Skype for Business (Lync) – Easiest way to add trusted root certificate authorities to Edge
Sep17

Skype for Business (Lync) – Easiest way to add trusted root certificate authorities to Edge

Ok here is a little tip when trying to add trusted root certificate authorities to Skype for Business 2015 and Lync 2010/2013 Edge servers. Microsoft have a list of Unified Communications Certificate Providers detailed here: https://support.microsoft.com/en-us/kb/929395 Windows now automatically downloads Trusted Root certificates when you access a web page on HTTPS.  We can exploit this to get all Trusted Root certificates on our...

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Lync – Page file causes Front End to run out of disk space (sqlservr.exe and pagefile)
Apr17

Lync – Page file causes Front End to run out of disk space (sqlservr.exe and pagefile)

I have recently encountered a strange issue where all 3 Front End servers in the same pool ran out of disk space at the same time.  When investigating both sqlservr.exe processes (RTCLOCAL and LYNCLOCAL) were consuming the whole page file (or all of the available space on C: as the pagefile was system managed).  In Resource Monitor I could see the commit for both sqlservr.exe processes was extremely high.  Apologies for the poor...

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Lync – Move On Prem users to Lync Online from CSV
Apr17

Lync – Move On Prem users to Lync Online from CSV

Microsoft detail how to move users from Lync On-Prem to Lync Online and how to bulk move users in an OU or with a particular AD attribute: https://technet.microsoft.com/en-us/library/jj204969%28v=ocs.15%29.aspx?f=255&MSPPError=-2147217396. If you want to bulk move users to Lync Online from a CSV you can use the PowerShell below: PowerShell $creds=Get-Credential Import-Csv movelyncusers.csv -Header Identity | Foreach-Object...

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Lync – Office 365 Federation Presence Unknown
Apr02

Lync – Office 365 Federation Presence Unknown

A customer was having problems with their Lync 2010 deployment federating with Office 365.  When searching for a Lync Online user they would see “Presence Unknown” and be unable to send Instant Messages.  They could Federate with other On-Prem Lync organisations OK.  They had LyncOnline configured as a Hosted Provider and Partner Domain Discovery Enabled (Dynamic Federation).  Their _sipfederationtls._tcp DNS record was...

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Lync – Unable to sign in via Edge (Checkpoint Firewalls)
Mar24

Lync – Unable to sign in via Edge (Checkpoint Firewalls)

I recently ran into a problem with Checkpoint Firewalls on a Lync 2010 deployment.  The customer already had a single 2010 Front End and wished to enable external sign in over the internet as it did not work over their VPN solution (Direct Access).  I installed the Edge server and Reverse Proxy but then encountered a strange issue where I was unable to sign in over the Edge server.  Some of the troubleshooting steps I took (Thinking...

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