Is there any way we can find number of concurrent user accessing the mails using OWA and MAPI

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Hi, For Exchange 2010: The Get-LogonStatistics cmdlet retrieves logon information about currently active sessions. On Mailbox servers only, you can use the Get-LogonStatistics cmdlet without parameters. In this case, the cmdlet returns the logon statistics for all mailboxes on all databases on the local server. Note:Users who log on to their mailboxes using Microsoft Office Outlook Web App aren't continually connected to the Mailbox server. An Outlook Web App client connects to the server, performs tasks, and then disconnects from the server. Therefore, you may see few or no logon statistics for Outlook Web App, even if users are logged on with this client. For Exchange 2003: http://www.msexchange.org/tutorials/microsoft-exchange-server-user-monitor.html Hope it helps. Best Regards!Please remember to click Mark as Answer on the post that helps you, and to click Unmark as Answer if a marked post does not actually answer your question. This can be beneficial to other community members reading the thread.