Deep dive # 1: How to configure Exchange on-premise Server hybrid integration with Office 365/Azure Infrastructure and test REST API calls?

This is one of the regular discussion that comes across at my desk, how we can configure Hybrid Exchange on-premise server integration with Office 365/Exchange Online, so that users can make use of REST API. So I thought let me stitch all of them together which can be handy for both the Exchange administrators and…

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Graph API : Subscription lifetime changes for Outlook resources

If your application uses user tokens to create subscriptions to Outlook resources, then you need to update your apps as needed to handle this scenario. This only applies to applications that use user tokens to create subscriptions. Applications that use app tokens to create subscriptions are not affected by this change. Existing applications do not…


[Upcoming changes] Exchange Web Services API for Office 365

Exchange Web Services (EWS) was launched as a part of Microsoft Exchange 2007 as a SOAP based API that allows access to Exchange and Exchange Online data. Starting July 3, 2018, Exchange Web Services (EWS) will no longer receive feature updates. While the service will continue to receive security updates and certain non-security updates, product…


Azure/Office 365 Graph API developer: RefreshToken, AccessToken, IdentityToken

These are 3 common terms (Refresh Token, Access Token, Identity Token) in Azure/Office 365 Graph API Cloud developer world and we get tons of queries on this. So let me try to explain them in simple terms … Access Token:- The access token is attached to every REST API request in the authorization header. -…


Developer: Office 365 APIs and Mobile App Development

Office 365 is built on a mobile-first strategy. Office runs on almost any device these days, so why not your own custom applications? In this session, find out how you can build powerful Office 365 connected applications for any mobile platform. Hope this helps.


Cloud developer guidance: Microsoft Graph or Azure AD Graph?

This is one of the frequent query which i come across. whenever i talked to my app developer customers community. They wanted to know whether they should be using Microsoft Graph (developer.microsoft.com/graph) or Azure AD Graph (graph.windows.net); also i see good number of discussion threads talking the same. In order to conclude this and provide…


Use Microsoft Graph API to reach on-premises, cloud users of hybrid Exchange 2016

As you aware, Office 365 and Exchange Online provide a new way to work with email, calendars, and contacts. The Mail, Calendar, and Contact REST APIs provide a powerful, easy-to-use way to access and manipulate Exchange data. In this video, you will see Venkat, Principal Program Manager lead will walk you through how to use…

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Office 365 Developers – Catch up on Outlook APIs in Microsoft Graph

  In Build 2017, i attended good number of sessions virutally, including this one by Venkat Ayyadevara, Program Manager, Outlook EcoSystem about Outlook API’s in Microsoft Graph. In this, you can learn about recent updates in Microsoft Graph for accessing Outlook mail, calendar, contacts and more for millions of commercial and consumer users. You can…


Cloud Developer: Office 365 REST API returns 401 access denied with an error code of “invalid_token”

In recent times i worked with this cloud developer (Azure AD, Office 365 REST API) where they created a custom application. It uses (Calendar, Contact, Mail APIs) to pull items from the specified user mailbox. Intermittently they see “401 Access Denied” followed by error code “invalid_token” from the API. During the investigation, we noticed that…

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Exchange TAP: Microsoft Graph Preview for Exchange 2016 customers

– Are you the app developer of Microsoft Graph API? – Want to develop and validate an Exchange hybrid solution? – Do you have Exchange 2016 CU3 or later installed? If “yes”, then this space is for you. We are interested in working with Exchange 2016 customers or partners to help us validate Exchange hybrid…