Isolating Lync users


First, exclude the users from the Exchange GAL by setting the msExchHideFromAddressLists user attribute to true. This will hide them at the Exchange level within the company. No one will stumble upon them in their address book.

Second, isolate the users from Lync address book so that they can only discover themselves. This is accomplished with another user attribute: msRTCSIP-GroupingID


This attribute is a 16-character GUID which, if present, only returns contacts that also have the same GUID value present on their account. 

In other words, if John has this attribute set to 1111111111111111, then he can only search for and discover other users (by name) that also have the same value for this attribute. It should be noted that, just like federation, if John were to enter the full SIP URI of a user, he would find them. So while it can’t be considered complete isolation, it provides enough isolation to satisfy our needs. That is, not exposing internal users to this external group.
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About Paul B

My name is Paul Bloem and I am employed at Lexel Systems in New Zealand as a Principal Consultant for Unified Communications. I have been working on enterprise voice solutions for over 20 years. My first 10 years were spent working for a Telco in South Africa (Telcom SA). This is where all the groundwork happened as I was exposed to just about every aspect of telecommunication you could imagine. I develop an interest in PBX technologies and eventually became the go-to guy. Next, I had a 10 year run at Siemens South Africa, most of my time there was as a Technical Trainer. During this time VoIP hit the world stage, I had the privilege of introducing VoIP both as H.323 and later SIP across the Siemens HiPath 4000 solution stack. In 2008 I immigrated to New Zealand with my newly attained MCSE, I was ready to go where no PBX Techie had gone before. I was employed to explore OCS 2007 and that was pretty much the beginning of the end for me. I have been working on OCS and Lync ever since. My current role focuses exclusively on Lync and associated technologies.. That includes pre-sales, consulting, architecture and design, training and support. I even get to play in the development space from time to time - focus on play ;-) I was nominated as a Microsoft VTSP for Lync early in 2013 and also awarded Microsoft's MVP award for Lync in 2014.
This entry was posted in Address Book, AddressBook, AddressBook Service, contacts, Hide Contacts, Isolating Lync users. Bookmark the permalink.

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