Lync Audio Test Services not Running Event-ID 32003


So I had an interesting error today at work. When I tried to use the “Check Call” feature in the Lync Client to check for the quality of the voice call, I got a lovely error saying “Operation unsuccessful”

So I was happy (because I rarely have problem or tickets regarding my Lync Infrastructure at work ).

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Lync Behind the Scene – Part 3

this is part 3 of this series Lync Behind the Scene, you can find Part -1 and Part 2 using the following links

Lync Behind the Scene – part 1

Lync Behind the Scene – part 2

SIP Message Syntax


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Understanding Lync DNS records and Autoconfiguration



In This article I will be explaining the Lync DNS requirements

One of the critical components for Lync to work is the DNS Entries. Lync uses two kind of DNS entries:

  1. A record
  2. SRV record

The DNS is usually deployed in a “Split-brain” deployment, this mean that the same zone as the external zone is deployed internally but with different IP-address than the public routable ones.

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Lync Behind the Scene – Part 1

Lync Protocols

SIP (Session Initiation Protocol) is the backbone of all Lync Platforms, Lync was built on the use of SIP, SIP was also extended to accommodates the additional functionalities provided by Lync.

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Understanding Lync Security – Part 1

Securing Lync is Critical, especially now a day, where security breaches are common.

Our focus will be on securing external access to Lync. Lync Edge server and Director server are here for that, for providing external access to Lync and protect it in the same time.

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Lync Address Book


I’m sure a number of you had this problem too, a user complain that when he/she search the Lync client or phone address book for a user, they get no results.

First I would like to explain briefly how Lync Address Book is generated and synchronized.

  1. Changes done to the User account in the Active Directory are synched automatically with Lync every 60 sec.
  2. Those changes are written to the SQL back-end of your Lync Deployment.
  3. Every 24h (1:30AM server local time) Lync Address book server will start synchronization job that pull recent data stored in the SQL rtc database, and write them to the Address Book files.
  4. Lync Client or Lync Phone Edition download any updated address book files (.dabs & .lsabs) and update the “GALContact.db” saved locally, this process happen randomly by the Lync Client or Phone Edition.

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Publish Lync URL using Apache Server


So as TMG2 2010 is being taking out of the picture, some companies looking for 3rd party option to publish their Lync Services.

We are one of those companies, we still in decision making stage should we go with Hardware Load Balancer with publishing or is there is something cheaper.

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