[schemers]

actually, the <context> element is always in the "urn:zimbra" namespace.

If you run:

zmprov -d createAccount {name} {password}

You'll see the SOAP it sends:

<soap:Envelope xmlns:soap="http://www.w3.org/2003/05/soap-envelope">
  <soap:Header>
    <context xmlns="urn:zimbra">
      <authToken>...</authToken>
      <sessionId id="317">317</sessionId>
    </context>
  </soap:Header>
  <soap:Body>
    <CreateAccountRequest xmlns="urn:zimbraAdmin">
      <name>user9@slapshot.local</name>
      <password>test123</password>
    </CreateAccountRequest>
  </soap:Body>
</soap:Envelope>

Is it possible to dump the outgoing SOAP in PHP to compare? Another option is turn on debugging in the server.

I do that by editing log4j.properties (/opt/zimbra/conf) and adding:

log4j.logger.zimbra.soap=DEBUG

Then it should log every soap packet in/out of the server in the /opt/zimbra/log/mailbox.log file.