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What the 0x80072020?

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I have found a small bug (as in, “Not working as expected!”) in the new .NET 3.5 PrincipalContext classes. When you are running on an ASP.NET site in impersonation mode you cannot retrieve information from active directory without the following error:

System.Runtime.InteropServices.COMException (0x80072020): An operations error occurred. at System.DirectoryServices.DirectoryEntry.Bind(Boolean throwIfFail) at System.DirectoryServices.DirectoryEntry.Bind() at System.DirectoryServices.DirectoryEntry.get_AdsObject() at System.DirectoryServices.PropertyValueCollection.PopulateList() at System.DirectoryServices.PropertyValueCollection..ctor(DirectoryEntry entry, String propertyName) at System.DirectoryServices.PropertyCollection.get_Item(String propertyName) at System.DirectoryServices.AccountManagement.PrincipalContext.DoLDAPDirectoryInitNoContainer() at System.DirectoryServices.AccountManagement.PrincipalContext.DoDomainInit() at System.DirectoryServices.AccountManagement.PrincipalContext.Initialize() at System.DirectoryServices.AccountManagement.PrincipalContext.get_QueryCtx() at System.DirectoryServices.AccountManagement.Principal.FindByIdentityWithTypeHelper(PrincipalContext context, Type principalType, Nullable`1 identityType, String identityValue, DateTime refDate) at System.DirectoryServices.AccountManagement.Principal.FindByIdentityWithType(PrincipalContext context, Type principalType, IdentityType identityType, String identityValue) at System.DirectoryServices.AccountManagement.UserPrincipal.FindByIdentity(PrincipalContext context, IdentityType identityType, String identityValue) at UI_Controls_SharepointControl.Page_Load(Object sender, EventArgs e)

You need to specify a fixed account to access AD using:

Dim ctx As New PrincipalContext(ContextType.Domain, “[domain]”, “[accountName]”, “[password]”)

This is not so good! What if I wanted to use the current users credentials to update only fields that they are allowed to update in AD? If I use a static account that can access any users fields then this becomes a security risk.

Ahh well, I will live with it for now, but if anyone has another suggestion…

 

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Martin Hinshelwood NKDAgility.com

Martin Hinshelwood NKDAgility.com

Martin Hinshelwood has worked with many customers in government, finance, manufacturing, health and technology to help them adopt and improve their agility using DevOps and Agile techniques. He writes regularly on naked Agility's Blog, and speaks often on DevOps, Agile & Process Improvement with Scrum, Visual Studio, and TFS. Martin is available onsite for technical or agile mentioning, coaching, or consulting. Find out what Martin's customers say about him and his work.

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