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POcan't connect to AD without specifically connecting to a DC
 

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  1. POcan't connect to AD without specifically connecting to a DC
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    <p>I'm trying to bind to an Active Directory server in C# but on-site I seem to have issues not reproducible in the test environment.</p> <p>I'm getting an Exception</p> <pre><code>System.Runtime.InteropServices.COMException (0x8007203A): The server is not operational. at System.DirectoryServices.DirectoryEntry.Bind(Boolean throwIfFail) at System.DirectoryServices.DirectoryEntry.Bind() at System.DirectoryServices.DirectoryEntry.RefreshCache() at System.DirectoryServices.DirectoryEntry.FillCache(String propertyName) at System.DirectoryServices.DirectoryEntry.get_NativeGuid() </code></pre> <p>the code looks like this</p> <pre><code>// domainStr = "LDAP://domainname/rootDSE using (var de = new DirectoryEntry(domainStr, Username, Password)) { var guid = de.NativeGuid; } </code></pre> <p>however if I try to connect the the Domain Controller instead (<code>domainStr = "LDAP://domainController/rootDSE"</code> or fully qualified <code>domainStr = "LDAP://domainController.DomainName"</code>) it works just fine.</p> <p>I tried</p> <pre><code>var d = Domain.GetDomain(new DirectoryContext( DirectoryContextType.Domain, domainStr, Username, Password)); </code></pre> <p>but I get the exact same Exception when doing that.</p> <p>I'm wondering if I'm doing something wrong, maybe a different LDAP URL would work better or if that's a common problem I'm having (even though google searches bring up that problem I haven't found a solution that works for me)</p> <p>Also it might be worth pointing out that the server the software is running on is not in any Active Directory and I have a list of ADs that I connect to (hence the username and password when trying to connect)</p>
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    1. COIs that machine you're using "on-site" member of that domain?? If not, you will need to specify a specific domain user + pwd to be able to do anything. Also, I believe the proper LDAP path would be just `LDAP://RootDSE` - does that one work for you??
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    2. COI'm not sure what do you mean! but sure with C# you can connect to AD with specifying DCs IP/Name/Address even if your machine not a member of the Domain.
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    3. COThe machine is not a member of the domain (thus I can't just connect with `LDAP://RootDSE`). However I did use a username and password when trying to connect but still get the above exception unless I explicitly specify a domain controller.
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