Tag Archives: lync

How to Change the File Store Location for a Lync Server 2010 Front End Server/Pool

Want to move a file store from one server to another?  Here’s how to do it!

Right from Microsoft: http://technet.microsoft.com/en-us/library/gg195742.aspx

Lync 2010 Server – Lync 2011 for Mac Clients Failing To Connect

Today, I ran across the issue of some Lync clients not being able to connect up to our Lync 2010 server.  They were receiving the following error:

Sign in to Microsoft Lync failed because the service is not available or you may not be connected to the internet.

Turned out this was caused by having an invalid SSL certificate.  The reason the certificate was invalid was this particular Mac was not apart of the domain and therefore the root CA’s certificate was not trusted.  Simply importing the root certificate into the keychain logged the user right in.

Lync 2010 – Cannot Synchronize Address Book

If you receive this error:

The Lync 2010 client or the Office Communicator client does not download the corporate address book and displays a notification: “Cannot Synchronize Address Book”

Give the following a shot:

  1. Shutdown the Lync client
  2. Force the Lync client to download the address book immediately the next time it starts:
    • Open the registry to HKLM\Software\Policies\Microsoft\Communicator
    • Modify (or Create) the DWORD  the registry key “GalDownloadInitialDelay” and set it to 0  (that is a zero)
    • This can also be done from the command line:
      • reg add HKLM\Software\Policies\Microsoft\Communicator /v GalDownloadInitialDelay /t REG_DWORD /d 0 /f
  3. Delete the Existing Local Address Book Files:
    • On Windows 7 or Vista machines, open Windows Explorer to the directory:
    • Delete the files GalContacts.db and GalContacts.db.idx
  4. Restart the Lync client.
    •    The address book should be available in less than an hour.

I found the solution here: http://blog.insidelync.com/2012/02/lync-address-book-client-synchronization-errors-and-common-problems/  Give it a read, it’s very thorough.

Lync 2010 – NTLM protocol failed with error SEC_E_UNSUPPORTED_FUNCTION

If you receive this error inside of the Lync Server event log on your Front End server:

User authentication with NTLM protocol failed with error SEC_E_UNSUPPORTED_FUNCTION. This indicates a potential mismatch between security policy settings on the client and server computers.

Cause: This error can occur if the settings in “Network security: Minimum session security for NTLM SSP based (including secure RPC) clients” policy on the client computer are not the same as the settings in the “Network security: Minimum session security for NTLM SSP based (including secure RPC) servers” policy on this server. By default, the “Require 128-bit encryption” setting is disabled for computers running Windows Server 2008, Windows Vista, Windows Server 2003, Windows 2000 Server, or Windows XP. For computers running Windows 7 or Windows Server 2008 R2, this setting enabled by default.
Resolution:
Ensure that the “Network security: Minimum session security for NTLM SSP based (including secure RPC) clients” policy settings on the computers from which users log on are the same as “Network security: Minimum session security for NTLM SSP based (including secure RPC) servers” policy settings on this server.

Here is the fix:
1. Open up Group Policy Editor (Start->Run->gpedit.msc) (Or if you are on a domain, open up group policy editor on the domain controller)
2. Expand Local Policies under Computer Configuration
3. Select Security Options
4. Scroll Down and find the following policies:

  • Network security: Minimum session security for NTLM SSP based (including secure RPC) clients
  • Network security: Minimum session security for NTLM SSP based (including secure RPC) servers

5. Change both policies to have “Require 128-bit encryption” checked

Reboot the machine(s)

Lync Server Installation – ERROR_NEED_MAJOR_UPGRADE_USE_IMP_EXP

If you are getting an error like:
Error: Script failed (code “ERROR_NEED_MAJOR_UPGRADE_USE_IMP_EXP”) when installing “CentralMgmtStore” on …

When installing Lync 2010, try dropping the “xds” table from your database and letting it cleanly install:

C:\>sqlcmd -S.\RTC
1> DROP DATABASE xds
2> GO
1> QUIT