There was an error downloading ‘http://localhost/…./Service.asmx’. The request failed with HTTP status 503: Service Unavailable.

I was receiving this error when I was trying to add web reference to the webservice which was deployed in our server from inside our Visual Studio.


But putting the same url in the IE, everything seemed to work fine. So there was no issue of IIS not running.


Later I realized that the issue was because of the a software that I was using Ultrasurf (UltraSurf is the flagship software product from UltraReach Internet Corp. for Internet anti-censorship. It enables users inside countries with heavy Internet censorship to visit any public web sites in the world safely and freely.)


But even after closing the UltraSurf the problem persisted. I restarted the system, cleared my system using CCleaner but wasn’t able to solve the problem.


Finally this is something I tried and it worked for me


I went to Tools Internet Options Connections (tab) LAN Settings for IE


In the LAN settings dialog box, checkbox Bypass Proxy Server for local addresses was checked so I unchecked it than clicked OK two times to close both the dialog boxes.


Then again went to Tools Internet OptionsConnections (tab) LAN Settings

And in the LAN setting dialog box again checked it.


This way I was able to resolve the issue of not being able to add web reference to web services from inside Visual Studio.







Unhandled Exception: System.IO.FileNotFoundException: Could not load file or assembly ‘Microsoft.Crm.Sdk….’

I created a simple plugin and when I was trying to register the plugin through the plugin registration tool I was getting the follwing error

Unhandled Exception: System.IO.FileNotFoundException: Could not load file or assembly ‘Microsoft.Crm.Sdk, Version=, Culture=neutral, PublicKeyToken=31bf3856ad364e35’ or one of its dependencies. The system cannot find the file specified.

at System.Reflection.Assembly._GetExportedTypes()

at System.Reflection.Assembly.GetExportedTypes()

at PluginRegistrationTool.AssemblyReader.RetrievePluginsFromAssembly(String path) in C:\Documents and Settings\arvinds1\Desktop\PluginRegistration\AssemblyReader.cs:line 59

at PluginRegistrationTool.AssemblyReader.RetrievePluginsFromAssembly(String path)

at PluginRegistrationTool.RegistrationHelper.RetrievePluginsFromAssembly(String pathToAssembly) in C:\Documents and Settings\arvinds1\Desktop\PluginRegistration\RegistrationHelper.cs:line 49

at PluginRegistrationTool.PluginRegistrationForm.btnLoadAssembly_Click(Object sender, EventArgs e) in C:\Documents and Settings\arvinds1\Desktop\PluginRegistration\PluginRegistrationForm.cs:line 127


The way I resolved the issue was by adding the microsoft.crm.sdk.dll to my machine’s GAC !!

I hope it works for others as well !!!

Many to many relationship in CRM 4.0 and Fetch XML

We have a custom entity called line of business (lob) for different line of business’s in our organization.

In CRM 3.0 there was no way we could have associated the lob custom entity with the system entity Team as there was no way of creating relationship between them.

But in CRM 4.0 we can now create a many to many relationship between the two.

Creating a many to many relationship between the two creates a new entity


Now say we want to write a custom code to retrieve all the teams associated with a given line of business, we can write something like below ( If we use query expression and retrieve multiple request it gives the error message saying that RetrieveMultiple is not supported on this entity)

This is the custom code for that

// setting the authentication token

CrmAuthenticationToken token = new CrmAuthenticationToken();

// 0- refers active directory

token.AuthenticationType = 0;

token.OrganizationName = “organizationname”;


CrmService crmService = new CrmService();

crmService.Url = http://servername/mscrmservices/2007/CrmService.asmx”;

crmService.Credentials = System.Net.CredentialCache.DefaultCredentials;

crmService.CrmAuthenticationTokenValue = token;


string fetch2= @”<fetch mapping=’logical’>

<entity name=’new_team_new_lineofbusiness’>

<attribute name=’teamid’ />


<condition attribute=’new_lineofbusinessid’ operator=’eq’ value=’C4BE129E-9B3C-DB11-8CBA-001185E68627′ />





// Fetch the results.



String result2 = crmService.Fetch(fetch2);


XmlDocument doc = new XmlDocument();


XmlNodeList xnodlist = doc.GetElementsByTagName(“teamid”);

string teamID = “”;

if (xnodlist.Count != 0)


for (int i = 0; i < xnodlist.Count; i++)


XmlNode xnodRoot = xnodlist.Item(i);

teamID = xnodRoot.InnerText;




catch (SoapException ex)





Only the owner of an object can revoke the owner’s access to that object


We had written a callout for auto sharing and unsharing of opportunity’s record for postassign event.

On creation of the record we were auto sharing the record with the owner’s manager.

On change of the owner we are first unsharing the record with the owner’s manager and sharing it with new owner’s manager.

While doing this the error we are receiving  is  this

“Only the owner of an object can revoke the owner’s access to that object “

This error is  coming in this particular scenario

say we have a record shared with a particular user say A

now when we are trying to set the new owner as A what the code is trying to do is that,

it is trying to unshare the record with A  this is the point where we receiving this  error!!!

For e.g.

Lead record is owned by User A and is Shared with User A.

Now the Revoke code is running in context of User B and tries to run Revoke for User A who is the owner. We will get this error message.


Microsoft Dynamics CRM 3.0 and Microsoft Dynamics CRM 4.0 differences

Multiple organizations can now be hosted and WSDL APIs are now unique per organization.


The metadata API service has been extended to retrieve language information.


Plug-ins (callouts) and workflow now use the same event framework, allowing for even more extensibility.


The SDK has been expanded to include offline access.


Now we can programmatically create, read, update and delete the metadata such as entities, attributes and relationship.


There are three services instead of two which we used to have in previous version


CrmService – http://<crmserver>/mscrmservices/2007/crmservice.asmx

MetadataService – http://<crmserver>/mscrmservices/2007/metadataservice.asmx

DiscoveryService – http://<crmserver>/mscrmservices/2007/ad/crmdiscoveryservice.asmx


Previously to write callout we had to reference the follwing assembly




Instead now we have to reference these assemblies


  • Micorsoft.Crm.Sdk.dll
  • Micorsoft.Crm.SdkTypeProxy.dll
  • Micorsoft.Crm.Outlook.Sdk.dll



Now we can to settings and can then select customizations there we have the option of

Download Web Service Description File.


There we can find wsdl files for both CrmService and MetadataService which we can download to our machine and can the simply add web reference to them.



Previously to access and use the CrmService following lines of code were enough


CrmService service=new CrmService();

service.Url=// url for the CrmService



But now because of the multiple organization support we need to write the following lines of code to identify the organization for which we are writing our custom solution.


CrmAuthenticationToken token = new CrmAuthenticationToken();

token.AuthenticationType = 0;

            // 0- Active Directory

            // 1- Microsoft Dynamics CRM Live

            // 2- Internet-Facing deployment (IFD)

token.OrganizationName=“”;// name of the organization


CrmService service=new CrmService();

service .Url=// url for the CrmService            service.Credentials=System.Net.CredentialCache.DefaultCredentials;

service.CrmAuthenticationTokenValue = token;



We have to access the Metadataservice in the similar manner i.e. creating CrmAuthenticationToken and assigning it to CrmMetadataService’s CrmAuthenticationTokenValue.


In 3.0 version we could use Metadataservice to access metadata information about any specific entity however in the new version following things are possible


  • Creating a customentity.
  • Add or update an attribute for an entity.
  • Create or delete a relationship between two entities.
  • Add or remove an option from a picklist attribute and few others.



  // CrmDiscoveryService Web service can provide a list of organizations and their corresponding Web service

 // endpoints URL’s. We will use it to configure the CrmService and MetadataService Web service proxies.


  CrmDiscoveryService discService = new CrmDiscoveryService();

  discService.UseDefaultCredentials = true;

  discService.Url = http://localhost/MSCRMServices/2007/AD/CrmDiscoveryService.asmx&#8221;;


  // Retrieve the list of organization

RetrieveOrganizationsRequest orgRequest = new    RetrieveOrganizationsRequest();

RetrieveOrganizationsResponse orgResponse =(RetrieveOrganizationsResponse) discService.Execute(orgRequest);


// Loop through the list to locate the target organization


OrganizationDetail orgInfo = null;

foreach (OrganizationDetail orgDetail in orgResponse.OrganizationDetails)


if (orgDetail.OrganizationName == “OurOrganizationName”)


          orgInfo = orgDetail;





After obtaining the organization details, we can then access the CrmService and MetadataService Web Services to perform our business logic.



References :

Working with Microsoft Dynamics CRM 4.0 (Microsoft Press)

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