diff --git a/htdocs/emailcollector/class/emailcollector.class.php b/htdocs/emailcollector/class/emailcollector.class.php
index 71d1768fedc..913b7b08a55 100644
--- a/htdocs/emailcollector/class/emailcollector.class.php
+++ b/htdocs/emailcollector/class/emailcollector.class.php
@@ -762,6 +762,11 @@ class EmailCollector extends CommonObject
 		if ($norsh || !empty($conf->global->IMAP_FORCE_NORSH)) {
 			$flags .= '/norsh';
 		}
+		//Used in shared mailbox from Office365
+		if (strpos($this->login, '/') != false) {
+			$partofauth = explode('/', $this->login);
+			$flags .= '/authuser='.$partofauth[0].'/user='.$partofauth[1];
+		}
 
 		$connectstringserver = '{'.$this->host.':993'.$flags.'}';