Note: if you cannot locate the necessary folder under Library, type in the full path in the Finder or Spotlight search.

Delete all keychains starting with Skype For Business.

Open Keychain Access from /Applications/Utilities folder.

~/Library/Application Support > Skype folder.

Go to Finder > press Command+Shift+G > type in ~/Library > delete the following files:.

In the Run Prompt, type appwiz.cpl and click OK.

In your Login keychain, delete all e-mail address certificates. If you have installed this version, you need to use the Add/Remove program to uninstall Skype from Windows 10.

Delete all keychains starting with OC_Ke圜ontainer.

Open Keychain Access from /Applications/ Utilities folder.

Go to Finder > press Command+Shift+G > type in /users//documents > navigate to Microsoft User Data > delete the following folders: Microsoft Lync Data and Microsoft Lync History.

Logs > Microsoft-Lync-x.log and Microsoft-Lync.log.

Keychains > all files beginning with OC_Ke圜ontainer.

Go to Finder > press Command+Shift+G > type in /users//library > delete the following files:.

Clear DNS cache: in Command Prompt run ipconfig / flushdns command.

Navigate to Users > username > AppData > Local > Microsoft > Office > x.0 (x.0 corresponds to the Skype for Business/Lync version: 16.0 = Skype for Business 2016, 15.0 = Skype for Business 2013, 14.0 = Lync 2010) > Lync.

Delete any sign-in info ( only in Skype For Business 2013/2016).

Skype for Business 2016 for MAC Skype for Business/Lync for Windows

Your Outlook and Lync integration is not functioning properly.

Common reasons you will want to clear Lync cache include: Skype for Business/Lync caches files locally on a PC or MAC to pull information quickly and efficiently.

Remove skype for business windows 10