Oct 21, 2014  Sign in to Microsoft Lync failed because the service is not available or you may not be connected to the Internet. This error message is misleading because the cause of it is likely. Feb 13, 2020 Rerun the Microsoft Online Services Directory Synchronization Tool (DirSync). For details, see AIntegrate your on-premises directories with Azure Active Directory. To troubleshoot Skype for Business Online sign-in errors, start by eliminating the most common causes of sign-in difficulty. Original Title: Setting Up Microsoft Lync for Mac 2011. 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.'

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Mac Sign In To Microsoft Lync Failed Email

Resolved: Microsoft Lync unavailable on a number of Mac computers

Microsoft Lync 2010 Sign In

Friday, December 16th, 2016

Microsoft Login

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