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+===================================
+Upgrade Notes from KE14 to Kolab 16
+===================================
+
+The purpose of this document is, to describe the procedure of upgrading a Kolab Goupware installation from a default installed KE14 to Kolab 16 on Enterprise Linux 7 (or CentOS 7).
+
+.. WARNING::
+
+    If your Kolab installation is a default standard installation, this guide is useful. Please consider any non default configurations of environment or software that you might have in play before upgrading.
+
+    Customers of `Kolab Systems AG`_, please contact your account manager with any questions or concerns.
+
+
+Upgrade Procedure
+=================
+
+#.  Remove the existing KE14 repositories:
+
+    .. parsed-literal::
+
+        # :command:`yum remove kolab-14-enterprise-release`
+
+#.  Install the new Kolab 16 repositories:
+
+    .. parsed-literal::
+
+        # :command:`yum install https://ssl.kolabsys.com/kolab-16-for-el7.rpm`
+
+#.  Update all:
+
+    .. parsed-literal::
+
+        # :command:`yum -y update`
+
+
+Updating the Configuration
+==========================
+
+After upgrading the packages to Kolab 16 repository, the configuration needs to be updated.
+
+1.  Update the IMAP configuration:
+
+   .. parsed-literal::
+
+	# :command:`setup-kolab imap`
+
+2.  Configure the module "Guam":
+
+    .. parsed-literal::
+
+        # :command:`setup-kolab guam`
+
+