It is possible to use Lync for Mac 2011 with Microsoft Online Services (despite what Microsoft will tell you).
The following configuration steps will allow you to connect to the BPOS OCS servers:
- Install the Lync for Mac 2011 client.
- Open the preference pane and select the Account tab.

Click the Edit… button under the Server Settings heading. - In the Advanced Server Settings dialog, enter pool1.oconline.microsoftonline.com:443 in both the Internal Server Name and External Server Name fields.

- Close the preference pane and select the Microsoft Lync window. Enter the following information:
- Email Address: user@contoso.com
- User ID: RED001\user_contoso.com
- Password: Your password
- Click Sign In and …


Excelente! Gracias!
Hi, I tried this and not able get this worked. Any help appreciated.
I did exactly what is documented but unable to get it working. ????????????
You may need to change your password on the BPOS side after implementing the changes above.