Microsoft Lync – Unable to login with Office 365 account
Workaround
On every computer…
- In the upper-right area of Lync 2013, click the Gear icon to open the Options page.
- Under Options, navigate to Personal.
- Next to the sign-in address, click Advanced.
- Make sure that Manual Configuration is selected and that the configuration values are exactly as follows
Internal server name or IP address: sipdir.online.lync.com:443
External server name or IP address: sipdir.online.lync.com:443
Solution : Modifing the DNS configuration
You nedd to properly set the DNS configuration according to Microsoft Office 365 recomendation.
Check the folloing links :
https://technet.microsoft.com/en-us/library/hh852557.aspx
https://support.office.microsoft.com/en-us/article/Set-up-your-network-for-Lync-Online-81fa5e16-418d-4698-a5f0-e666211c5c66
You can use the Test Connectivity solution provided by Microsoft to make sure you applied the right configuration.
https://testconnectivity.microsoft.com
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