Clear Windows Cached Credentials

If users recently changed their network passwords as part of an Active Directory policy, it’s possible the password hasn’t been changed in other applications where the policy is pushed (Exchange/Outlook, Lync Messenger, and any other applications) and will cause lockouts for the account leading to headaches. A good practice if this happens often is to clear out old credentials in the Window Key Manager. 

 Add/Remove/Edit saved user names and passwords on a given system:

1. Go to Start -> Run
2.  
3. Type rundll32.exe keymgr.dll, KRShowKeyMgr

1. 
2. Manage your passwords and clear any old cached credentials you see.