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Clearing the Local Cache (Mac) - Lync

  1. Log out and quit Lync.
  2. 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
  3. 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.
  4. Open Keychain Access from /Applications/Utilities folder.
  5. Delete all keychains startting with OC__KeyContainer.
  6. In your Login keychain, delete all e-mail address certificates.
  7. Empty Trash.
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