Resolved: Microsoft Lync unavailable on a number of Mac computers
Nov 23, 2011 Original Title: 'lync fails to login' Lync login on mac client fails wit the error: Sign in to Microsoft Lync failed because the service is not available or you may not be connected to the internet. Mar 19, 2020 Original Title: Setting Up Microsoft Lync for Mac 2011. Microsoft office mac compatibility issues. I am setting Lync Mac 2011 and facing the following problem: 'Sign in to Microsoft Lync failed because the service is not available or you may not be connected to the internet.'

Friday, December 16th, 2016

Sign In To Microsoft Lync Failed Because The Service Mac And Paste
Incident Discovery Time: 06:00am on 12/16/2016 Time of Resolution: 05:00pm on 12/19/2016 Services Impacted: Other – see description
Description of Impact
Some clients received the following error message when trying to log into Lync 2011 on a Mac: “Sign in to Microsoft Lync failed because the service is not available or you may not be connected to the Internet.” Incident Description and Resolution
The incident is now resolved. If you continue to have issues, please contact the IT Help Center. Previous Update
Incident Discovery Time: 09:40am on 12/16/2016 Services Impacted: Other – see description Description of Impact
Some clients receive the following error message when trying to log into Lync 2011 on a Mac: “Sign in to Microsoft Lync failed because the service is not available or you may not be connected to the Internet.” Current Status
IS&T teams have not yet identified the cause of the incident, but are investigating. Additional Information
The current workaround is to install the Mac version of Skype for Business. Next Update: Upon resolution