diff --git a/pykolab/setup/setup_imap.py b/pykolab/setup/setup_imap.py
--- a/pykolab/setup/setup_imap.py
+++ b/pykolab/setup/setup_imap.py
@@ -142,10 +142,14 @@
 
         myaugeas.close()
 
+    imapservice = 'cyrus-imapd.service'
+    if os.path.isfile('/usr/lib/systemd/system/cyrus.service'):
+        imapservice = 'cyrus.service'
+
     if os.path.isfile('/bin/systemctl'):
         subprocess.call(['systemctl', 'stop', 'saslauthd.service'])
         subprocess.call(['systemctl', 'restart', 'kolab-saslauthd.service'])
-        subprocess.call(['systemctl', 'restart', 'cyrus-imapd.service'])
+        subprocess.call(['systemctl', 'restart', imapservice])
     elif os.path.isfile('/sbin/service'):
         subprocess.call(['service', 'saslauthd', 'stop'])
         subprocess.call(['service', 'kolab-saslauthd', 'restart'])
@@ -160,7 +164,7 @@
     if os.path.isfile('/bin/systemctl'):
         subprocess.call(['systemctl', 'disable', 'saslauthd.service'])
         subprocess.call(['systemctl', 'enable', 'kolab-saslauthd.service'])
-        subprocess.call(['systemctl', 'enable', 'cyrus-imapd.service'])
+        subprocess.call(['systemctl', 'enable', imapservice])
     elif os.path.isfile('/sbin/chkconfig'):
         subprocess.call(['chkconfig', 'saslauthd', 'off'])
         subprocess.call(['chkconfig', 'kolab-saslauthd', 'on'])
diff --git a/pykolab/setup/setup_mta.py b/pykolab/setup/setup_mta.py
--- a/pykolab/setup/setup_mta.py
+++ b/pykolab/setup/setup_mta.py
@@ -369,7 +369,19 @@
     template_file = None
 
     # On RPM installations, Amavis configuration is contained within a single file.
-    if os.path.isfile("/etc/amavisd/amavisd.conf"):
+    amavisconf_paths = [
+            "/etc/amavisd.conf",
+            "/etc/amavis/amavisd.conf",
+            "/etc/amavisd/amavisd.conf"
+        ]
+
+    amavis_conf = ''
+    for amavisconf_path in amavisconf_paths:
+        if os.path.isfile(amavisconf_path):
+            amavis_conf = amavisconf_path
+            break
+
+    if os.path.isfile(amavis_conf):
         if os.path.isfile('/etc/kolab/templates/amavisd.conf.tpl'):
             template_file = '/etc/kolab/templates/amavisd.conf.tpl'
         elif os.path.isfile('/usr/share/kolab/templates/amavisd.conf.tpl'):
@@ -391,12 +403,7 @@
             t = Template(template_definition, searchList=[amavisd_settings])
 
         fp = None
-        if os.path.isdir('/etc/amavisd'):
-            fp = open('/etc/amavisd/amavisd.conf', 'w')
-        elif os.path.isdir('/etc/amavis'):
-            fp = open('/etc/amavis/amavisd.conf', 'w')
-        elif os.path.isfile('/etc/amavisd.conf'):
-            fp = open('/etc/amavisd.conf', 'w')
+        fp = open(amavis_conf, 'w')
 
         if not fp == None:
             fp.write(t.__str__())
@@ -435,10 +442,17 @@
             myaugeas.save()
         myaugeas.close()
 
+    amavisservice = 'amavisd.service'
+    clamavservice = 'clamd@amavisd.service'
+    if os.path.isfile('/usr/lib/systemd/system/amavis.service'):
+        amavisservice = 'amavis.service'
+    if os.path.isfile('/usr/lib/systemd/system/clamd.service'):
+        clamavservice = 'clamd.service'
+
     if os.path.isfile('/bin/systemctl'):
         subprocess.call(['systemctl', 'restart', 'postfix.service'])
-        subprocess.call(['systemctl', 'restart', 'amavisd.service'])
-        subprocess.call(['systemctl', 'restart', 'clamd@amavisd.service'])
+        subprocess.call(['systemctl', 'restart', amavisservice])
+        subprocess.call(['systemctl', 'restart', clamavservice])
         subprocess.call(['systemctl', 'restart', 'wallace.service'])
     elif os.path.isfile('/sbin/service'):
         subprocess.call(['service', 'postfix', 'restart'])
@@ -455,8 +469,8 @@
 
     if os.path.isfile('/bin/systemctl'):
         subprocess.call(['systemctl', 'enable', 'postfix.service'])
-        subprocess.call(['systemctl', 'enable', 'amavisd.service'])
-        subprocess.call(['systemctl', 'enable', 'clamd@amavisd.service'])
+        subprocess.call(['systemctl', 'enable', amavisservice])
+        subprocess.call(['systemctl', 'enable', clamavservice])
         subprocess.call(['systemctl', 'enable', 'wallace.service'])
     elif os.path.isfile('/sbin/chkconfig'):
         subprocess.call(['chkconfig', 'postfix', 'on'])
diff --git a/pykolab/setup/setup_mysql.py b/pykolab/setup/setup_mysql.py
--- a/pykolab/setup/setup_mysql.py
+++ b/pykolab/setup/setup_mysql.py
@@ -62,7 +62,9 @@
     mysqlservice = 'mysqld.service'
     if os.path.isfile('/usr/lib/systemd/system/mariadb.service'):
         mysqlservice = 'mariadb.service'
-    if os.path.isfile('/bin/systemctl') and not os.path.isfile('/usr/lib/systemd/system/' + mysqlservice):
+    elif os.path.isfile('/usr/lib/systemd/system/mysql.service'):
+        mysqlservice = 'mysql.service'
+    if not os.path.isfile('/usr/lib/systemd/system/' + mysqlservice):
         # on Debian Jessie, systemctl restart mysql
         mysqlservice = 'mysql'
 
diff --git a/pykolab/setup/setup_roundcube.py b/pykolab/setup/setup_roundcube.py
--- a/pykolab/setup/setup_roundcube.py
+++ b/pykolab/setup/setup_roundcube.py
@@ -89,9 +89,26 @@
             'conf': conf
         }
 
-    if os.access('/usr/share/roundcubemail/skins/enterprise/', os.R_OK):
+    rc_paths = [
+            "/usr/share/roundcubemail/",
+            "/usr/share/roundcube/",
+            "/srv/www/roundcubemail/",
+            "/var/www/roundcubemail/"
+        ]
+
+    rcpath = ''
+    for rc_path in rc_paths:
+        if os.path.isdir(rc_path):
+            rcpath = rc_path
+            break
+
+    if not os.path.isdir(rcpath):
+        log.error(_("Roundcube installation path not found."))
+        return
+
+    if os.access(rcpath + 'skins/enterprise/', os.R_OK):
         rc_settings['skin'] = 'enterprise'
-    elif os.access('/usr/share/roundcubemail/skins/chameleon/', os.R_OK):
+    elif os.access(rcpath + 'skins/chameleon/', os.R_OK):
         rc_settings['skin'] = 'chameleon'
     else:
         rc_settings['skin'] = 'larry'
@@ -161,14 +178,6 @@
                     break
         break
 
-    if os.path.isdir('/usr/share/roundcubemail'):
-        rcpath = '/usr/share/roundcubemail/'
-    elif os.path.isdir('/usr/share/roundcube'):
-        rcpath = '/usr/share/roundcube/'
-    else:
-        log.error(_("Roundcube installation path not found."))
-        return
-
     for root, directories, filenames in os.walk(rcpath + 'plugins/calendar/drivers/kolab/'):
         for filename in filenames:
             if filename.startswith('mysql') and filename.endswith('.sql'):
@@ -239,7 +248,7 @@
 
     root_uid = 0
 
-    for webserver_group in [ 'apache', 'www-data' ]:
+    for webserver_group in [ 'apache', 'www-data', 'www' ]:
         try:
             (a,b,webserver_gid,c) = grp.getgrnam(webserver_group)
             break
@@ -251,11 +260,12 @@
             for filename in filenames:
                 os.chown(os.path.join(root, filename), root_uid, webserver_gid)
 
+    httpservice = 'httpd.service'
+    if os.path.isfile('/usr/lib/systemd/system/apache2.service'):
+        httpservice = 'apache2.service'
+
     if os.path.isfile('/bin/systemctl'):
-        if os.path.isfile('/etc/debian_version'):
-            subprocess.call(['/bin/systemctl', 'restart', 'apache2.service'])
-        else:
-            subprocess.call(['/bin/systemctl', 'restart', 'httpd.service'])
+        subprocess.call(['/bin/systemctl', 'restart', httpservice])
     elif os.path.isfile('/sbin/service'):
         subprocess.call(['/sbin/service', 'httpd', 'restart'])
     elif os.path.isfile('/usr/sbin/service'):
@@ -264,10 +274,7 @@
         log.error(_("Could not start the webserver server service."))
 
     if os.path.isfile('/bin/systemctl'):
-        if os.path.isfile('/etc/debian_version'):
-            subprocess.call(['/bin/systemctl', 'enable', 'apache2.service'])
-        else:
-            subprocess.call(['/bin/systemctl', 'enable', 'httpd.service'])
+        subprocess.call(['/bin/systemctl', 'enable', httpservice])
     elif os.path.isfile('/sbin/chkconfig'):
         subprocess.call(['/sbin/chkconfig', 'httpd', 'on'])
     elif os.path.isfile('/usr/sbin/update-rc.d'):
diff --git a/pykolab/setup/setup_syncroton.py b/pykolab/setup/setup_syncroton.py
--- a/pykolab/setup/setup_syncroton.py
+++ b/pykolab/setup/setup_syncroton.py
@@ -86,11 +86,12 @@
 
     time.sleep(2)
 
+    httpservice = 'httpd.service'
+    if os.path.isfile('/usr/lib/systemd/system/apache2.service'):
+        httpservice = 'apache2.service'
+
     if os.path.isfile('/bin/systemctl'):
-        if os.path.isfile('/etc/debian_version'):
-            subprocess.call(['/bin/systemctl', 'restart', 'apache2.service'])
-        else:
-            subprocess.call(['/bin/systemctl', 'restart', 'httpd.service'])
+        subprocess.call(['/bin/systemctl', 'restart', httpservice])
     elif os.path.isfile('/sbin/service'):
         subprocess.call(['/sbin/service', 'httpd', 'restart'])
     elif os.path.isfile('/usr/sbin/service'):
@@ -99,10 +100,7 @@
         log.error(_("Could not start the webserver server service."))
 
     if os.path.isfile('/bin/systemctl'):
-        if os.path.isfile('/etc/debian_version'):
-            subprocess.call(['/bin/systemctl', 'enable', 'apache2.service'])
-        else:
-            subprocess.call(['/bin/systemctl', 'enable', 'httpd.service'])
+        subprocess.call(['/bin/systemctl', 'enable', httpservice])
     elif os.path.isfile('/sbin/chkconfig'):
         subprocess.call(['/sbin/chkconfig', 'httpd', 'on'])
     elif os.path.isfile('/usr/sbin/update-rc.d'):