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Microsoft Windows update and Kerio Outlook ConnectorRecent Microsoft Windows update KB2585542 (released on Tuesday, January 10, 2012) changes the winhttp.dll system library which is used by Kerio Outlook Connector (Offline Edition). The update changes the data flow in a network communication over TLS (SSL) secured connection used in HTTPS communication of Kerio Outlook Connector with Kerio Connect server. This change is not compatible with Kerio Connect server.
Q: How do I know I’m affected? What are the symptoms?
A: Users may experience various symptoms, depending on Microsoft Outlook version they use. These symptoms include:
A: To verify that open Control Panel, select Programs and then select Programs and Features and choose “Installed updates” option and look for “KB2585542” in Microsoft Windows section.
Q: How do I fix it?
A: Install Kerio Connect 7.3.1 patch 2 and update all Kerio Outlook Connectors to this version. Kerio Outlook Connector will be updated automatically from Kerio Connect server.
Q: I cannot update the server. What else can I do?
A: There are two possible workarounds for customers who don’t or can’t update to Kerio Connect 7.3.1 patch:
Q: Does it affect Kerio Connector for Blackberry?
A: Yes, this problem affects also Kerio Connector for Blackberry. The solution (or workaround) is the same as for Kerio Outlook Connector. Preferred solution is upgrade of Kerio Connector for Blackberry and Kerio Connect to version 7.3.1 patch 2.
Q: What Kerio Outlook Connector versions are affected?
A: Affected are all Kerio Outlook Connector versions on Windows XP, Windows Vista and Windows 7 with installed KB2585542 update.
Q: I don’t use SSL. Do I need to install Kerio Connect 7.3.1 patch 2?
A: No. If you don’t use SSL (HTTPS) for synchronization of Kerio Outlook Connector with Kerio Connect server then there is no requirement for installing the patch.