Logons with an expired account or password are still issued a valid token for the site.
Disabled or locked accounts are correctly rejected.
Normal sequence of events for a new ID is to set it up with a password the user must change at first logon.
The Sign On control evidently verifies a valid password and issues a token without checking for expiration of the account or password.
Note: I am researching a custom membership provider because ActiveDirectoryMembershipProvider does not supply required information to the People Picker - (the signon ID is all I have to work with at present)
The mechanism of changing the password is yet another area under research&development.
Any tips in these latter points are appreciated as well. But Authentication really needs to validate the credentials correctly including expiration.
Actually I am using System.Web.Security.ActiveDirectoryMembershipProvider, as stated above in the title and body of the post.
The LDAP provider is not available for SharePoint Foundation and does not work.
Parser Error Message: Could not load type
'Microsoft.Office.Server.Security.LdapMembershipProvider' from assembly
'Microsoft.Office.Server, Version=184.108.40.206, Culture=neutral,
SharePoint Foundation does not supply Microsoft.Office.Server.UserProfiles (in Microsoft.Office.Server.UserProfiles.dll) which contains this namespace,
I spent a couple days trying to follow the article refernced in your reply before discovering this
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