Using AD Provider 5.0.2, some of my users cannot login.  The strange thing here is that I can take the same password and enter it into OWA and I login just fine.  Thus far, I'm not seeing any pattern.  Here is the error from the SiteLog:

AssemblyVersion: 5.1.0
PortalID: 7
UserID: -1
UserName:
ActiveTabID: 530
ActiveTabName: Login
RawURL: /Login/tabid/530/Default.aspx?returnurl=%2fdefault.aspx
AbsoluteURL: /Default.aspx
DefaultDataProvider: DotNetNuke.Data.SqlDataProvider, DotNetNuke.SqlDataProvider
ExceptionGUID: 202cc6c5-3766-4644-96a5-62386b05f92b
InnerException: Logon failure: unknown user name or bad password.
FileName:
FileLineNumber: 0
FileColumnNumber: 0
Method: System.DirectoryServices.DirectoryEntry.Bind
StackTrace:
Message: System.DirectoryServices.DirectoryServicesCOMException (0x8007052E): Logon failure: unknown user name or bad password.at System.DirectoryServices.DirectoryEntry.Bind(Boolean throwIfFail)at System.DirectoryServices.DirectoryEntry.Bind()at System.DirectoryServices.DirectoryEntry.get_NativeObject()at DotNetNuke.Authentication.ActiveDirectory.ADSI.ADSIProvider.IsAuthenticated(String Path, String UserName, String Password)

I'm not sure if the following error is related, but it seemed pertinent.  I'm also getting a lot of "access denied" on the cache:

AssemblyVersion: 5.1.0
PortalID: -1
PortalName:
UserID: -1
UserName:
ActiveTabID: -1
ActiveTabName:
RawURL:
AbsoluteURL:
AbsoluteURLReferrer:
UserAgent:
DefaultDataProvider: DotNetNuke.Data.SqlDataProvider, DotNetNuke.SqlDataProvider
ExceptionGUID: 0610e4c7-4a4f-4a30-8f21-513497d14c10
InnerException: Access to the path 'C:\inetpub\wwwroot\Portals\_default\Cache\17E5D845D1EEE4E30D964507075B2E04.resources' is denied.
FileName:
FileLineNumber: 0
FileColumnNumber: 0
Method: System.IO.__Error.WinIOError
StackTrace:
Message: System.UnauthorizedAccessException: Access to the path 'C:\inetpub\wwwroot\Portals\_default\Cache\17E5D845D1EEE4E30D964507075B2E04.resources' is denied.at System.IO.__Error.WinIOError(Int32 errorCode, String maybeFullPath)at System.IO.FileStream.Init(String path, FileMode mode, FileAccess access, Int32 rights, Boolean useRights, FileShare share, Int32 bufferSize, FileOptions options, SECURITY_ATTRIBUTES secAttrs, String msgPath, Boolean bFromProxy)at System.IO.FileStream..ctor(String path, FileMode mode, FileAccess access, FileShare share, Int32 bufferSize, FileOptions options, String msgPath, Boolean bFromProxy)at System.IO.FileStream..ctor(String path, FileMode mode, FileAccess access, FileShare share, Int32 bufferSize, FileOptions options)at System.IO.StreamWriter..ctor(String path, Boolean append, Encoding encoding, Int32 bufferSize)at System.IO.StreamWriter..ctor(String path, Boolean append)at System.IO.File.CreateText(String path)at DotNetNuke.Services.Cache.FileBasedCachingProvider.FBCachingProvider.CreateCacheFile(String FileName, String CacheKey)

Can you give me some background on how you setup the AD provider. An IO error means that it's trying to write to the disk but can't because the user account being used doesn't have permission.

Right after posting this, I changed the AppPool identity to "DOMAIN\user" and that seemed to fix the caching problem, which allowed me to troubleshoot with a little more accuracy.

Here's what I'm getting for one of the users who is having an issue:

When I attempt to login as the user using the correct password, I get "Login Failed, remember that Passwords are case sensitive" and no errors in Log Viewer.  When I attempt to login as the user using the incorrect password, I get "Login Failed, remember that Passwords are case sensitive" and the "Logon failure: unknown user name or bad password" error from my first post.

Since yesterday, approximately 20 new users have logged in and had their username created.  So far, this seems to be affecting 5 users.