Index: component/univention-office365/modules/univention/office365/azure_auth.py
===================================================================
--- component/univention-office365/modules/univention/office365/azure_auth.py	(Revision 80300)
+++ component/univention-office365/modules/univention/office365/azure_auth.py	(Arbeitskopie)
@@ -53,6 +53,7 @@
 from univention.lib.i18n import Translation
 from univention.office365.logging2udebug import get_logger
 from univention.config_registry.frontend import ucr_update
+from univention.config_registry import ConfigRegistry
 
 
 _ = Translation('univention-office365').translate
@@ -78,6 +79,8 @@
 federation_metadata_url = "https://login.microsoftonline.com/{tenant_id}/federationmetadata/2007-06/federationmetadata.xml"
 resource_url = "https://graph.windows.net"
 
+ucr = ConfigRegistry()
+ucr.load()
 logger = get_logger("office365", "o365")
 
 
@@ -219,6 +222,15 @@
 			json.dump(data, fd)
 
 
+def get_http_proxies():
+	res = dict()
+	if ucr['proxy/http']:
+		res['http'] = ucr['proxy/http']
+	if ucr['proxy/https']:
+		res['https'] = ucr['proxy/https']
+	return res
+
+
 class AzureAuth(object):
 
 	def __init__(self, name):
@@ -368,7 +380,7 @@
 			# the certificates with which the tokens were signed can be downloaded from the federation metadata document
 			# https://msdn.microsoft.com/en-us/library/azure/dn195592.aspx
 			try:
-				fed = requests.get(federation_metadata_url.format(tenant_id=tenant_id))
+				fed = requests.get(federation_metadata_url.format(tenant_id=tenant_id), proxies=get_http_proxies())
 			except RequestException as exc:
 				logger.exception("Error downloading federation metadata.")
 				raise TokenValidationError, TokenValidationError(_("Error downloading certificates from Azure. Please run the wizard again."), chained_exc=exc), sys.exc_info()[2]
@@ -459,7 +471,7 @@
 		url = oauth2_token_url.format(tenant_id=self.tenant_id)
 
 		logger.debug("POST to URL=%r with data=%r", url, post_form)
-		response = requests.post(url, data=post_form, verify=True)
+		response = requests.post(url, data=post_form, verify=True, proxies=get_http_proxies())
 		if response.status_code != 200:
 			logger.exception("Error retrieving token (status %r), response: %r", response.status_code,
 				response.__dict__)