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Archive for the ‘Office Communications Server’ Category

Changing SIP address of OCS Enabled Users – What is the impact?

Posted by Milind Naphade on 13/04/2011

I was talking to one of my very good friends yesterday. He was asked to test the impact of changing SIP of the OCS enabled user accounts.

Honestly, its really tricky to answer a question when someone asks you about the predicted impact of changing SIP addresses. I was able to find something related to this here

The article linked above though said that Curtis (the blog author) did not test it change of SIP address in Group Chat.


I thought I could check some possibilities in my lab. The results from my lab are something like this.

  • Internal users to your SIP pool or for that matter entire organization will not be affected due to change in their SIP address.
  • The only adverse effect of changing SIP address is the dependant applications in the organization. If you have any application that uses the SIP address for sending IMs to the recipients then these applications would fail. I have a SCOM server in my environment which had a IM channel configured. The SCOM stopped sending emails after I changed SIP address of the user account which was a recipient for SCOM alerts on IM.
  • If you are federated with other organizations and you are also added as a contact in contact list of federated users then your presence to your contacts will not work.
  • Group chat will have no negative effects of changing the SIP address. (I didn’t observe any).
  • Outlook integration of MOC breaks if the SIP address is different than the primary SMTP address of the user mailbox on Exchange server.

As mentioned in the linked blog as well, OCS would generate a UID for each enabled user and it will be stored in the configuration database. Communicator uses this UID for conversation with other OCS enabled users. This is the key point here which keeps the functionality working even after there is a change in SIP addresses.

I would appreciate your comments on this post as there may be several things that I was not able to test.

Posted in Office Communications Server | 1 Comment »

Microsoft Office Lync 2010 now available

Posted by Milind Naphade on 14/09/2010

I am not sure if you have been waiting for Microsoft Communications Server 14 launch so eagerly but I have been for sure. Finally, Microsoft Communications Server 14 RC is made available publically yesterday. This is a downloadable ISO and contains Microsoft Communications Server 14 Client too. One of the very interesting stuff is they have renamed this product from Microsoft Office Communications Server to Microsoft Lync now. Well, the new name seems really short and pretty. Honestly, Microsoft Office Communications Server was quite a lengthy name to pronounce 😉 The downloadable ISO is available at Microsoft Lync Server 2010 Release Candidate (RC) Review the system requirements on the same page. Lync is supported on Windows 2008 and Windows 2008 R2 only. Download and Enjoy 😉

Posted in News, Office Communications Server | Comments Off on Microsoft Office Lync 2010 now available