Working with exchange server 2010 is good experience. I have learnt many new things in that. I am using EWS api aka Exchange Web Service , to communicate with Exchange server. Everything was going smooth till yesterday. When the error was fired while sending an email using EWS API. The error message was saying that "The mailbox is unavailable" At the same time, while logging in Exchange server -> Exchange Management Console Clicking on Mailbox under Server Configuration in Left Action panel, will displays an error dialog that show possible causes of the problem. The problem can be resolved as follows: 1. Log on to Exchange Server. 2. Go to services 3. Start the Service " Microsoft Exchange Server Information store ". For safety purpose you can set the start process for this service as Automatic so that next time when your server restarted, It wont required manual start. if your exchange server and Domain controller a
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