To use Lync for Mac 2011, you need an email address and password from an organization that uses Lync Server, or has a business subscription to Microsoft 365.
Sign in to Lync for Mac
Important: Make sure you’ve installed the most current Microsoft Lync for Mac 2011 Update.
Enter your Email Address—for example: firstname.lastname@example.org.
Note: You may also be asked to enter your User ID. The user ID is what you use to sign in to your organization’s network, either email@example.com or domain\username.
(Microsoft 365 only) Go to Advanced > Authentication, uncheck the Use Kerberos box, and click OK.
Click Sign in.
If you can’t sign in, see I can't sign in to Lync.
Reset your password
If you forgot your password, or it doesn’t work anymore, contact your workplace technical support—typically the person who set up your Lync account for you. Provide them with these links:
Lync Server: Reset a user's password in Active Directory
Microsoft 365: Reset a user's password and Reset passwords for admins
Sign out of Lync for Mac
On the Status menu, click Sign Out.
After you sign out, you cannot send or receive messages, and you appear offline to other people.