EWS API throws error “No Mailbox with such GUID”

Recently i was working with an ISV/application developer, who created this custom application using EWS (Exchange Web Services) API. It worked with the account with impersonation rights to access other mailboxes/calendars in Azure/Office 365/Exchange Online. But when they tried to access a specific mailbox calendar, they see the error “No mailbox with such GUID”. We…


Exploring with Microsoft Exchange Server Protocols docs

Recently I got requests from the developer community regarding my earlier article – so I take this opportunity to point how you can explore more about Microsoft Exchange Server Protocols. As you know through the Open Specifications program, Microsoft is helping developers open new opportunities by making technical documents related to interoperability for certain popular…


Feedback: Go Live, VS 2010 SP1, .Net Framework 4 KB2162169 Beta

We are pleased to declare that Visual Studio (VS) 2010 Service Pack 1 Beta and the .NET Framework 4 KB2162169 Beta will be supported as a “go live” release. This means that this software has met high standards of quality for a pre-release, and we are licensing it for developing and deploying production applications. VS2010…

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Future Roadmap for IronRuby & IronPython

Microsoft announced the road forward for IronRuby and IronPython.  These two dynamic language implementations that incubated internally the last few years. We have released several versions of both language environments (IronPython releases and IronRuby releases), and all of the source code has been released under open source licenses (recently moved to Apache License V2.0). For…