Mektozo , Just another Contoso ! :)

Enabling event loggin on Lync clients can be done eithr by enabling the option "Turn on Windows  Event Logging for Lync" or for all users by using Client Policies. From Lync Management Shell run the following command: Set-CsClientPolicy -Identity "Global" -EnableEventLogging $true Then Sign in and out from your Lync client you should see the option set in the Lync client options:

I had a problem where the Lync Server Front-End server could not start and found the following error in the event viewer's system log " The Lync Server Front-End service terminated with service-specific error %%-1008193021. " It was due to that the Installation bits used were evaluation bits and it had expired, the solution was to upgrade to the RTM version. see my other post for info. about how to upgrade from Eval to RTM. http://amrmekawy.blogspot.com/2012/02/upgrade-from-lync-evaluation-edition-to.html

If you have installed Lync Server using the 180 Day  trial bits  you can upgrade to the RTM bits nsing the following easy steps: Run setup.exe on your Lync server Volume License media. Click on "Install or Update Lync server system" Click on "Setup or remove Lync server components" Open CMD and  navigate to \Setup\amd64\setup and then run msiexec.exe /fvomus server.msi EVALTOFULL=1 /qb  Open Lync Server Management Shell and then run Enable-CSComputer and then you are done !

I faced the following problem at a cusotmer, When i opened the WSUS console i get the following message: and the following error in the event viewer: Log Name: Application Source: Windows Server Update Services Date: 2/12/2012 3:16:29 PM Event ID: 7053 Task Category: None Level: Error Keywords: Classic User: N/A Computer: Description: The WSUS administration console has encountered an unexpected error. This may be a transient error; try restarting the administration console. If this error persists, Try removing the persisted preferences for the console by deleting the wsus file under %appdata%\Microsoft\MMC\. System.NullReferenceException -- Object reference not set to an instance of an object. Source Microsoft.UpdateServices.UI.SnapIn Solution: after investigation i found out that the Windows Internal Database service was not running, starting it fixed the problem immediately.

In order to get Lync Phone Edition (LPE) to Synchrnize time you need either and SRV record that points to your NTP servers (which may be your domain controllers) or allow Internet connection to your LPE devices, as LPE synchnronizes time using one of the following methods: Lync Phone Edition searches for an NTP server in Domain Name System (DNS)  , it looks for the SRV record  _ntp._udp. pointing to NTP Server If Lync Phone Edition cannot find the NTP SRV record, it will attempt to use http://time.windows.com as an NTP server by searching for time.windows.com so either create the SRV record or allow Internet access to time.windows.com on port 123 UDP. fore more info. refer to http://technet.microsoft.com/en-us/library/gg398829.aspx

I have faced a problem at a cusomter site;mails  cannot flow from an Exchange 2010 server to a specific Exchange 2003 server , while it can flow to other Exchange 2003 servers. Exchange 2010 servers were in AD domain: ChildA.parent.com and Exchange 2003 server was in ADdomain : ChildB.parent.com. Domain controllers of domain ChildB.parent.com only existed at the site of Exchange 2003. The queue viewer gave the following message : " 451 4.4.0 Primary Target IP Address Responded with (501 5.5.4 Auth Command Cancelled) "  and the application log gave the following error: Outbound authentication failed with error -2146892976 for Send connector Intra-Organization SMTP Send Connector. The authentication mechanism is Gssapi. The target is SMTPSVC/Exchange2003ServerFQDN i have checked the SPN , using Setspn -l Exchange2003ServerName aother posts on the Internet suggested, the SPN was not in place so i had to add it using : setspn -a SMTPSVC/Exchange2003ServerFQDN Ex...