Exchange Outlook Web App and OCS 2007 R2 integration
I don't know if everyone knows about this feature, but for me i think this is one of the coolest integration features in OCS 2007 R2 and Exchange 2010.
The concept is to integrate outlook web App with office communications Server 2007 R2 for presence and instant messaging, which means that users using Outlook web App will have The ability to provision their presence and use a built-in instant messaging system to chat with other OCS users, in addition to the basic Outlook Web App features. Isn't cool!
Let's get started and see how this can be accomplished.
You get “Iashlpr initialization failed” error after installing DHCP on Windows 2008R2
After installing DHCP server on windows 2008 R2, you notice that your system event log will be filled with Errors Event ID: 1070 “Iashlpr initialization failed: The DHCP service was unable to access path specified for the audit log. So DHCP server cannot talk to NPS server. It could be that IAS service is not started.”
Event ID: 1070
Source: DHCP-ServerIashlpr initialization failed: The DHCP service was unable to access path specified for the audit log. So DHCP server cannot talk to NPS server
At first I have ignored this error since it wasn’t affecting my DHCP Server behavior, everything was working fine, and clients were obtaining proper IP addresses and network settings.
Until I had to configure WPAD entry in order to enable TMG Firewall Client to automatically detect the TMG server. TMG clients were failing to automatically detect the TMG Server, I start troubleshooting the issue, I tried everything add/remove the WPAD entry, changing the WPAD value, etc… but all my trials were unsuccessful.
ISA/TMG/IAG/UAG what is the difference!
Lot of people are confused about the difference between ISA/TMG/IAG/UAG, so I thought it would be a good idea to share this information hopping it will clear up this confusion.
Microsoft has lately released the “Forefront Threat Management Gateway (TMG)” formerly known by “Internet Security and Acceleration Server (ISA)”.
Microsoft has also released the “Forefront Unified Access Gateway (UAG)” formerly known by “Internet Access Gateway (IAG)”. By the way both products are run on 64bits only
So this means that TMG is the new version of ISA and UAG is the new version of IAG, mmm pretty simple right?
What is the Difference between TMG and UAG?
OCS 2007 R2 Clients cannot connect to Lync Server due to authentication Service incompatibility
After migrating to Lync 2010 server some of my client users where not able to log in using OCS 2007 R2 clients due an incompatibility in the Authentication Service version.
I have checked the OCS 2007 R2 client logs, by browsing to %userprofile%\tracing\Communicator-uccapi-0.uccapilog and noticed the following error
010/08/2010|11:51:55.781 E0C:14A8 INFO :: SIP/2.0 401 Unauthorized
