title: imapsync User is authenticated but not connected
body: <p>I'm using imapsync to migration email from outlook (email domain) to new server.
  But it show error:</p>
  
  <pre><code>Host1 capability: IMAP4 IMAP4rev1 AUTH=PLAIN AUTH=XOAUTH2 SASL-IR UIDPLUS MOVE ID UNSELECT CLIENTACCESSRULES CLIENTNETWORKPRESENCELOCATION CHILDREN IDLE NAMESPACE LITERAL+
  Host2 capability: IMAP4rev1 LITERAL+ SASL-IR LOGIN-REFERRALS ID ENABLE IDLE SORT SORT=DISPLAY THREAD=REFERENCES THREAD=REFS MULTIAPPEND UNSELECT CHILDREN NAMESPACE UIDPLUS LIST-EXTENDED I18NLEVEL=1 CONDSTORE QRESYNC ESEARCH ESORT SEARCHRES WITHIN CONTEXT=SEARCH LIST-STATUS
  Host1: NAMESPACE request failed for imap-mail.outlook.com: * BYE Connection closed. 14; 11 BAD User is authenticated but not connected.
  Give the separator character with the --sep1 option,
  the folowing listing of folders may help you to find it:
  Most of the time it is character . or /
  so try --sep1 . or --sep1 /
  </code></pre>
  
  <p>When I using telnet to connect outlook server, it response:</p>
  
  <pre><code>* OK Outlook.com IMAP4rev1 server version 17.4.0.0 ready (BAY451-IMAP140)
  1 LOGIN user@domain.com ******
  1 OK AUTHENTICATE completed.
  2 NAMESPACE
  2 BAD User is authenticated but not connected.
  3 LIST "" "*"
  3 BAD User is authenticated but not connected.
  * BYE Connection closed. 14
  </code></pre>