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Event ID: 179 Source: MSExchangeDSExp

Unable to initialize directory user agent (DUA) workspace.
From a newsgroup post: "Some antivirus software such as Norton AV may cause this problem. If so, please check if the AV software is running in Vapi or Mapi mode. Mapi mode AV applications may run directory exports to learn about new mailboxes.". One suggested troubleshooting aproach in these conditions is to temporarely stop the AV software and see if the error reoccurs.

ME274009 says that if you have scheduled automated directory exports this may occur because the maximum number of directory operation sessions is 10.

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