![]() ![]() ![]() At the same time, at Microsoft's recommendation, third parties were encouraged to perform all of their Exchange activities using these web services. Unfortunately, when they created the magical black box that is EWS, they also didn't give much in the way of Administrator documentation or good ways to control this within Exchange itself. With that - Exchange Web Services (EWS) was born. In doing so, most of the new components were re-written to take advantage of standard web-based protocols which were much easier to support and get through firewalls and the like. Beginning with Exchange 2007, Microsoft slowly started segregating all of these components to a new more segmented and supportable architecture. This included access for all email, calender, free/busy (availability), address books, etc. Originally all Microsoft "Corporate" email clients - Outlook primarily - used the MAPI protocol for all access to Exchange. Microsoft has confirmed that this is a problem in the Microsoft products that are listed in the "Applies to" section.A common request we get from customers it how they can block many problematic or unauthorized (and uncontrolled) email clients connecting to their Exchange servers via Exchange Web Services. To resolve this issue, install the following update rollup package:Ģ608646 Description of Update Rollup 6 for Exchange Server 2010 Service Pack 1 This issue occurs because EWS does not handle the content conversion failure that occurs when EWS tries to obtain the MimeContent property of items from the Exchange store. When this occurs, the EWS client application does not receive new items. In this scenario, EWS drops the TCP connection to the client application without any error message. ![]() For example, the item is an invalid iCal. This causes the content conversion of the item to MIME. The EWS client application uses the GetItem operation in EWS to obtain the MimeContent property of an item. For example, you use Microsoft Entourage for Mac or Microsoft Outlook for Mac 2011. You use a Microsoft Exchange Web Services (EWS) client application to access items in a Microsoft Exchange Server 2010 environment. Exchange Server 2010 Enterprise Exchange Server 2010 Standard More. ![]()
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