diff --git a/htdocs/emailcollector/class/emailcollector.class.php b/htdocs/emailcollector/class/emailcollector.class.php
index 729762be327..d6204fa632f 100644
--- a/htdocs/emailcollector/class/emailcollector.class.php
+++ b/htdocs/emailcollector/class/emailcollector.class.php
@@ -762,7 +762,12 @@ 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.'}';
 
 		return $connectstringserver;