Looking for logging into the Lync 365 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 365 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-skype-for-business-f104e76c-cef3-4468-8065-d75ea157e58d
https://support.office.com/en-us/article/start-using-lync-for-im-and-online-meetings-36d2a337-e835-4ae6-b821-44cb6907b17f
https://support.office.com/en-us/article/sign-in-to-and-sign-out-of-lync-b443c994-48bf-441c-9e33-ba7c804beb18
https://www.skype.com/en/business/
https://support.skype.com/en/faq/FA12230/how-do-i-activate-my-office-365-skype-minutes
https://docs.microsoft.com/en-us/previous-versions/office/developer/lync-online/hh467894(v%253Doffice.14)
https://docs.microsoft.com/en-us/office365/enterprise/urls-and-ip-address-ranges
https://docs.microsoft.com/en-us/office365/enterprise/powershell/manage-skype-for-business-online-with-office-365-powershell
http://www.google.ru/url?url=http://help.utk.edu/kb/index2.php%3Ffunc%3Dshow%26e%3D2459
https://intranet.birmingham.ac.uk/it/services/office365/index.aspx
https://technology.ku.edu/lync/owa
https://liberty.service-now.com/kb_view.do%3Fsys_kb_id%3D8f68ebf26906e140f47c0482f91900ae