Looking for logging into the Lync 2013 Online site and are not getting the correct working link for it? In such a case, you can use the links given here by searching your desired login page in the search box. If the page is present on our website then you will get all the links related to the Lync 2013 Online site. After that you can login as usual with your login credentials.
https://support.office.com/en-us/article/sign-in-to-and-out-of-lync-61867078-d794-428a-9b92-25767476163e
https://support.office.com/en-us/article/sign-in-to-and-sign-out-of-lync-b443c994-48bf-441c-9e33-ba7c804beb18
https://docs.microsoft.com/en-us/previous-versions/office/developer/lync-online/hh467894(v%253Doffice.14)
https://social.technet.microsoft.com/Forums/lync/en-US/7dabb61a-cde6-4055-8858-7c1ea1748221/is-there-a-way-to-login-to-lync-with-your-outlookcom-account%3Fforum%3Dlyncprofile
https://www.youtube.com/watch%3Fv%3D-ZN1AJGUioo
https://www.youtube.com/watch%3Fv%3D5XEfs-PGlj4
https://www.it.northwestern.edu/collaborate/lync/
https://www.cumulusit.nl/office-365-gids-lync-aanmeldproblemen-oplossen/
https://newsignature.com/articles/resolving-sign-in-issues-with-microsoft-lync-and-office365/
https://support.yeastar.com/hc/en-us/articles/217640038-How-to-Extend-Lync-2013-to-MyPBX-Part-1-Set-Up-Rules-in-Lync-Server-2013-
http://video.ch9.ms/sessions/lync/2014/CLNT400_Ricks.pptx
http://skype4businessinsider.com/conferencing/how-to-schedule-lync-online-meetings-using-a-different-user-identity/
https://community.spiceworks.com/topic/333385-lync-online-can-t-sign-in-unless-connected-to-corporate-network