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Using Lync as a SIP Softphone?

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I have just registered for a trial of a hosted PBX service from

I want to know if it is possible to use my Office 365 Lync 2010 client as a softphone and if so how to go about it?

I have these instructions from VOIP phone, which make it sound like it should be possible:

Download and run the software with all its default settings

If the Windows security box pops up, click 'unblock'

Go to your desktop and double click on the Zoiper icon

Open the settings page by clicking on the little spanner icon

Click 'Add new SIP account'

Enter your name (anything)

Domain =

Username = Your account number and extension with a * in between. eg 3xxxxxxx*2xx You can check your extensions here

Password = XXXXXX (your 6 digit password for the extension you're setting up - You can find here )

Caller ID the name you wish people to see when you call them

Click 'Apply' then 'OK'


Your phone should now say registered - try calling 152

However the only option I can see in Lync Client is "Integrate with my phone" and this is greyed out?

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  • Hi Darren_Monkey,

    Are you using Lync Online in Office 365? If so, I would like to explain that the PBX service is not supported by Lync Online at this point. For more information about Lync supported features, you can refer to the following article:

    Mindy Pan

  • Thanks for the response Mindy.

    So if I wanted to use Lync as a softphone I will need to deploy Lync Server On Premise?

  • Hi Darren_Monkey,

    Yes, to use PBX service, you will need to deploy Lync Server On Premise. Lync Server is also included in Office 365 E4 plan.

    Mindy Pan


  • Hi Darren_Monkey - hope all is well....

    To add to the above responses -- you have a variety of deployment options for using Lync voice with Office 365.  In addition to deploying "on-premise" -- you also have options around partner hosted Office 365 integrated Lync voice PBX solutions that provide subscription based / pay as you go models.

    Feel free to drop me a line & I can provide options on the "hosted" options as well as eval / pilot options.

    Hope this helps,

    David Bleecker

    1 out of 1 people found this post helpful.

  • Hi Mindy Pan MSFT Support,

    I was currious if the PBX service is currently supported bij Lync in Office 365. We have a 3rd party PBX in a hosted environment and we would like to use the Lync client as a SIP-phone. (directly or through the office 365 server)

    Thanks in advance.

  • Hi I.T.Stok,

    PBX is still not supported by Lync Online. For more information about Lync Online supported features, you can refer to the following article:

    Lync Online Service Description

    Mindy Pan