Why does EWS api ErrorNonPrimarySmtpAddress error?

Question

I have several user accounts in Office 365 tenant. Two of them are almost identical (have similar settings but different contact info and name). I try to fetch information (such as all folders and items) in user's mailbox using GetFolder operation from EWS API that contains next body:

<?xml version="1.0" encoding="utf-8"?>
<soap:Envelope xmlns:soap="http://schemas.xmlsoap.org/soap/envelope/"
         xmlns:t="http://schemas.microsoft.com/exchange/services/2006/types">
  <soap:Header>
    <t:RequestServerVersion Version="Exchange2013"/>
    <t:ExchangeImpersonation>
      <t:ConnectingSID>
        <t:PrimarySmtpAddress>[email protected]</t:PrimarySmtpAddress>
      </t:ConnectingSID>
    </t:ExchangeImpersonation>
  </soap:Header>
  <soap:Body>
    <GetFolder xmlns="http://schemas.microsoft.com/exchange/services/2006/messages"
         xmlns:t="http://schemas.microsoft.com/exchange/services/2006/types">
      <FolderShape>
        <t:BaseShape>AllProperties</t:BaseShape>
        <t:AdditionalProperties> </t:AdditionalProperties>
      </FolderShape>
      <FolderIds>
        <t:DistinguishedFolderId Id="outbox"/>
      </FolderIds>
    </GetFolder>
  </soap:Body>
</soap:Envelope>

I can successfully get info for one of these two mailboxes but when an error reply with the next body:

<?xml version="1.0" encoding="utf-8"?>
<s:Envelope xmlns:s="http://schemas.xmlsoap.org/soap/envelope/">
  <s:Body>
    <s:Fault>
      <faultcode xmlns:a="http://schemas.microsoft.com/exchange/services/2006/types">a:ErrorNonPrimarySmtpAddress</faultcode>
      <faultstring xml:lang="en-US">The primary SMTP address must be specified when referencing a mailbox.</faultstring>
      <detail>
        <e:ResponseCode xmlns:e="http://schemas.microsoft.com/exchange/services/2006/errors">ErrorNonPrimarySmtpAddress</e:ResponseCode>
        <e:Message xmlns:e="http://schemas.microsoft.com/exchange/services/2006/errors">The primary SMTP address must be specified when referencing a mailbox.</e:Message>
        <t:MessageXml xmlns:t="http://schemas.microsoft.com/exchange/services/2006/types">
          <t:Value Name="Primary"/>
        </t:MessageXml>
      </detail>
    </s:Fault>
  </s:Body>
</s:Envelope>

Why do I get such ErrorNonPrimarySmtpAddress error response? What can be the problem when I fetch data in the mailbox of the second user?

What is the request that returns that error? Are you specifying the primary SMTP address rather one of the proxy SMTP addresses? — Dmitry Streblechenko
@DmitryStreblechenko I've just updated the description and provided EWS GetFolder operation body that I use when I fetch info about folder in user mailbox. — Vasyl

Dmitry Streblechenko Dmitry Streblechenko · Accepted Answer · 2018-11-15T15:44:13

You need to use the primary SMTP address - I doubt [email protected] is the primary address.

Open the address book in Outlook (Ctrl+Shift+B), open the user, switch to the "E-mail Addresses" tab, look for the address with the "SMTP:" prefix (note the caps).

Why does EWS api ErrorNonPrimarySmtpAddress error?

1 Answers