Querformatik Posted September 8, 2013 Report Share Posted September 8, 2013 Hi all, Backup from Exchange Server 2007 on a Windows Small Business Server 2008 worked fine over years. Now I noticed that backup of E-Mails isn't working anymore since several weeks. I didn't change anything on the system except updating Windows and Retrospect. When trying to backing up a Mailbox I get the following error: Create MAPI session failed: Exchange MAPI/CDO may not be properly installed. Create MAPI session failed: Exchange MAPI/CDO may not be properly installed. Durchsuchen unvollständig, Fehler -3420 ( unbekannt) First I deinstalled Retrospect 8.2 and made a fresh install of Retrospect 8.1. But nothing changed. Afterwards I controlled, that .NET 4 is installed and I reinstalled Microsoft Visual C++ 2010 x64. But it's still not working. If I try to create a new backup and click on Exchange-Mailboxes a new window opens where I have to type in username and password. If I type in username and password and press ok, it isn't accepted. I even create a new RBU-user as it's described in the user manual. But that user isn't accepted, too. Afterwards you can find in the Retrospect protocol the error mentioned above: "Create MAPI session failed: Exchange MAPI/CDO may not be properly installed." Additionally I renamed the Retrospect folder at "C:\Program Data" and tried to backup the Exchange-Mailboxes with a fresh Retrospect configuration. But actually that didn't work, too. Do you have any ideas how to get it work? 1 Quote Link to comment Share on other sites More sharing options...
Querformatik Posted September 20, 2013 Author Report Share Posted September 20, 2013 I had to uninstall and re-install the MAPI client from http://www.microsoft.com/en-us/download/details.aspx?id=1004. Now it's working again. Quote Link to comment Share on other sites More sharing options...
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