Allow everything and except for what is listed on the block list EnforceBlockList.Block everything except everything on the allow list EnforceAllowList.There are two methods to blocking applications. Most companies only wish to target specific apps to block. The results listed above reports that the EwsApplicationAccessPolicy is not set and there is nothing in the EwsBlockList or the EwsAllowList Get-OrganizationConfig |ft Name,EwsApplicationAccessPolicy,EwsBlockList,EwsAllowList $Session = New-PSSession -ConfigurationName Microsoft.Exchange -ConnectionUri -Credential $UserCredential -Authentication Basic -AllowRedirection Let’s first review your organization and see if you have a Block List setting and if there are applications in there.Ĭheck out the video to provide instructions on connecting PowerShell to Exchange online:Įnter the following commands in PowerShell: You also need to make sure that your app requests the read/write mailbox permission in the apps for Office permission model. Set 'OAuthAuthentication' to true on the Client Access Server EWS directory. If your Exchange Server is older than above, then your only option with an Intel-based Mac is Entourage 2008. Microsoft Outlook 2011 is part of Office 2011. Microsoft Entourage EWS is a free upgrade from Entourage 2008. Is there anyway to instruct Windows Outlook client not to use MAPIHTTP and make use of EWS just like Mac Outlook client? Mail/Address Book/iCal are free with every installation of OS X. Windows Outlook client uses MAPIHTTP protocol to send and receive the mails where as Mac Outlook client is using EWS protocol. The Set-OrganizationConfig command is required to block applications attempting to access EWS applications followed by specifying two EWS parameters. My intent in writing this post was not meant to call out any specific app, rather, the app shown in the following post happened to be the one that I was asked to block by a client as it did not meet their corporate security policy. There are all many security reasons as to why the ask to block applications from using Exchange Web Services (EWS) would occur. In the era of BYOD the ask has probably been put forth to block a specific apps from accessing Office 365 / Exchange Online.
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