Skype for Business and Lync cache information on Windows or MAC OS X to read information quickly and efficiently. Possible reasons why you would want to clear the Skype for Business / Lync cache include:
- You cannot log in to Skype for Business.
- Your Outlook and Skype for Business integration is not functioning properly.
- You have issues with Presence.
- Your Contact list is out of date.
- You cannot search for users in Skype for Business.
Skype for Business, Lync 2010, Lync 2013 for Windows
- Log out of Skype for Business.
- Delete any sign-in info.
- Exit Lync.
- Open Run bar and type in %AppData%. Make sure you’re in the AppData directory and navigate to\Local\Microsoft\Office\15.0 (or 16.0)\Lync\ for Skype for Business and Lync 2013, or \Local\Microsoft\Office\12.0\Lync\ for Lync 2010.
- Delete sip_profileName folder. If you do not see this folder, check the \Local\Microsoft\Communicator directory.
- Delete all files in Tracing folder. Do not delete the folder itself.
- Clear DNS cache: in Command Prompt run ipconfig /flushdns command.
Lync 2011 for MAC
- Log out and quit Lync.
- Go to Finder > press Command+Shift+G > type in /users/<MacUsername>/library > delete the following files:
- Caches > com.microsoft.Lync
- Internet Plug-Ins > MeetingJoinPlugin.plugin
- Keychains > all files beginning with OC__KeyContainer
- Logs > Microsoft-Lync-x.log and Microsoft-Lync.log
- Preferences > com.microsoft.Lync.plist
- Preferences > ByHost > MicrosoftLyncRegistrationDB.xxxx.plist
- Go to Finder > press Command+Shift+G > type in /users/<MacUsername>/documents > navigate to Microsoft User Data > delete the following folders: Microsoft Lync Data and Microsoft Lync History.
- Open Keychain Access from /Applications/Utilities folder.
- Delete all keychains starting with OC__KeyContainer.
- In your Login keychain, delete all e-mail address certificates.
- Empty Trash.