hi everyone,

i'm using exchange server 2013 and write following code for getting searchable mailboxes and getting emails from these searchable mailboxes but i'm getting following error on "SearchMailboxes" function.

Code:

ExchangeService service = new ExchangeService(ExchangeVersion.Exchange2013);

        service.Credentials = new WebCredentials("example@example.com", "test123");

        service.AutodiscoverUrl("example@example.com", RedirectionUrlValidationCallback);

        GetSearchableMailboxesResponse gsMBResponse = service.GetSearchableMailboxes("example*", false);

        MailboxSearchScope[] msbScope1 = new MailboxSearchScope[gsMBResponse.SearchableMailboxes.Length];
        
        Int32 mbCount1 = 0;
        foreach (SearchableMailbox sbMailbox in gsMBResponse.SearchableMailboxes)
        {
            msbScope1[mbCount1] = new MailboxSearchScope(sbMailbox.ReferenceId, MailboxSearchLocation.PrimaryOnly);
            mbCount1++;
        }

        SearchMailboxesParameters smSearchMailbox1 = new SearchMailboxesParameters();
        MailboxQuery mbq1 = new MailboxQuery("attachment:'.xls'", msbScope1);
        MailboxQuery[] mbqa1 = new MailboxQuery[1] { mbq1 };
        smSearchMailbox1.SearchQueries = mbqa1;
        smSearchMailbox1.PageSize = 1000;
        smSearchMailbox1.ResultType = Microsoft.Exchange.WebServices.Data.SearchResultType.PreviewOnly;
        service.TraceEnabled = true;
        ServiceResponseCollection<SearchMailboxesResponse> srCol1 = service.SearchMailboxes(smSearchMailbox1);

ERROR:

The request failed schema validation: The element 'MailboxSearchScope' in namespace 'http://schemas.microsoft.com/exchange/services/2006/types' has invalid child element 'ExtendedAttributes' in namespace 'http://schemas.microsoft.com/exchange/services/2006/types'."}

anyone have idea to solve this?

Thanks