Manually configure Lync 2013 clients for Office 365

If you want to manually configure a connection to Lync Online – select Tools > Options in the Lync Client. Next select the Personal category on the left hand-side. You will see a screen which lists your sign-in address – click on the Advanced button next to it and select the Manual Configuration option. Fill in the following settings:

• Internal server name: sipdir.online.lync.com:443
• External server name: sipdir.online.lync.com:443

 

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