[Build 2019] Let’s develop a Microsoft Graph-powered productivity app

As part of Build 2019, i scheduled this Microsoft Graph API related session in my schedule builder – so thought of sharing this one Let’s learn how to use Microsoft Graph to bring together some of the best experiences from Microsoft Teams, Outlook, and SharePoint. In this Level 300 session, you will see how to…


Office 365 and new Outlook simplified ribbon

Well, if you’re using Outlook for a while, then you will be familiar with Outlook ribbon – contains all of the options and commands that you use to accomplish tasks in Outlook. For example, you can click buttons on the ribbon to create a new email, delete emails, open a new meeting request, or assign…


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…


Developer: Office Add-ins community call @ April 10, 2019

The Office Add-ins community call is our monthly event for developers to connect in real-time with the folks who are building the Office JavaScript APIs. We’ll share updates about new Office JavaScript APIs, provide tips about useful tools, samples, and resources for developing Office Add-ins, and feature a technical deep dive on a specific topic….

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Microsoft Graph API’s Beta version, developer guidance, support

Microsoft Graph API’s beta version, You need to be aware that beta version contains features that are currently in preview. You’re invited to try these APIs. Beta version is exposed under https://graph.microsoft.com/beta How to find if the feature is in beta or not, When you open the Graph API documentation, you will see the following…

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Developer: Outlook COM Add-in and Large Address Aware

Starting from build 16.0.8528.2147 (Version 1709) of the 32-bit version of Outlook 2016 for Windows has been updated to be Large Address Aware (LAA). This increases the maximum address space available to Outlook from 2 GB to 4 GB when it is running on a 64-bit version of Windows. This is key to improved graphics…

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Office Debug: Office add-ins are not displayed correctly in Outlook

Recently one of the ISV app developer reported that after they update Microsoft Outlook to version 1809 (build 10827.20181) or later versions, data from some Office add-ins may not be displayed correctly or may be missing from the user interface of the add-in within Outlook. Specifically in their case, they used IE Control hosted in…


Office.js web add-in throws HTTP 401 Unauthorized

One of my dev customer, created Outlook Web add-in (using Office.js/JavaScript) and tried calling EWS call (mailbox.makeEWSRequestAsync method). It throws HTTP error 401 for mailbox.makeEWSRequsetAsync() method. They noticed the error or behaviour when they tested with Outlook on the Web and Outlook Web Access for devices. The API call throws, the following HTTP error: “The…


Debug: Graph API throws HTTP 403 with $filter for some users

In recent times, i worked with one of the ISV developer who reported that for some users when they use $filter with Graph API calls throws HTTP 403 – Forbidden. The same call works fine with $filter for most of the users. We chased and found it happens for some users (and not for all…


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…


Outlook Developer: Outlook Object Model API, IRM, Do not forward option

With Outlook Object Model (OOM) API, now you can access the Outlook mail item and its permission property programmatically. You can set the Permission property – using that you can set or returns an OlPermission constant that determines the permissions the recipients will have on the e-mail item. C++ public: property Microsoft::Office::Interop::Outlook::OlPermission Permission { Microsoft::Office::Interop::Outlook::OlPermission get(); void…