Exchange gives you plenty of options to block clients from connecting to mailboxes, depending on the version of the Outlook client and the method used to access the mailbox. In this recipe, you'll learn how to configure these options using the Exchange Management Shell.
Let's take a look at how to block Outlook clients from connecting to Exchange using the following steps:
Set-CASMailboxcmdlet can be used to block MAPI access to mailboxes based on several factors. For example, we can prevent an individual user from using Outlook to connect using Outlook Anywhere:
Set-CASMailbox -Identity dsmith -MAPIBlockOutlookRpcHttp $true