Graph Developer: Microsoft Graph API fails with error RESTAPINotEnabledForComponentSharedMailbox

One of my customer tried accessing the Graph/REST API call using Microsoft Graph API in their mailbox and they get error “RESTAPINotEnabledForComponentSharedMailbox”. It worked for their couple of other mailboxes, but failed for this given mailbox. Their error stack (detailed one) looked like the following: {     “error”:     {         “code”: “RESTAPINotEnabledForComponentSharedMailbox”,         “message”:…

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Gotchas – Microsoft Graph/Outlook REST API throttling, best practices

In recent times, I was working with this customer where they make Graph API calls, Say, GET https://graph.microsoft.com/v1.0/users/YYY@XXX.onmicrosoft.com/mailFolders/inbox/messages?$skip=0&$top=30&$select=bodypreview,categories,conversationid,from,hasattachments,id,isdraft,isread,lastmodifieddatetime,parentfolderid,receiveddatetime,replyto,sender,sentdatetime,subject,torecipients and few other GET (read operations of mail folders/single item handles specifically) and few POST/PATCH calls. They noticed, once the throttling threshold is exceeded, Microsoft Graph limits any further requests from that client for a period of…

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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. -…

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Programmatically created email with attachment shows fields garbled

In recent times I was working with this developer customer. They created a custom application using Outlook Object Model (OOM) API – their app tries to create a new message programmatically with attachments. They notice the newly created items fields (such as the CC, BCC and TO) overlaps or garbled. Based on my tests with…

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Office.js: MakeEWSRequestAsync throws “The request exceeds the 1 MB size limit. Please modify your EWS request”

One of my customer created Outlook Web add-in (Office.js) and when he calls mailbox.makeEwsRequestAsync method. But they got the following error “The request exceeds the 1 MB size limit. Please modify your EWS request”. At the app level, the developer is making the call from web add-in to create a mail item in drafts folder…

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Office Developer: Difference between Office Web addin vs COM/VSTO addin

COM or VSTO add-ins are earlier Office integration solutions that run only on Office for Windows. The major difference what you see is that COM addins will be running in the user device or in the Office Client. The new Office Add-ins don’t involve code that runs on the user’s device or in the Office…


Office 365 Developer: Build add-ins for Microsoft Outlook

In this video you will see Petra provides a brief overview of the Outlook add-in platform and its capabilities. The add-in platform helps developers create native Outlook solutions, so users can get more done within Outlook. In short you can,- Learn what makes up an add-in- Get a high-level look at how to build one-…


Debug: Syncing custom EWS app to an Exchange Server 2010 mailbox receive ErrorServerBusy

When you try to synchronize an Exchange Web Service (EWS)-based application to a mailbox in a Microsoft Exchange Server 2010 environment, you receive an ErrorServerBusy response code and an error message that resembles the following: The server cannot service this request right now. Try again later. This error occurs when the server is busy. Exchange…


Office 365 Developer–Outlook actionable messages

In this video training, learn how to transform your workflows into actionable messages to engage with your users and make them more productive! Whether you are filling out a survey, approving an expense report, or updating a CRM sales opportunity, Actionable Messages enable you to take quick actions right from within Outlook and Teams. Developers…


Developer: How to use Github for Windows users?

If you’re a Developer who is curious about Git and GitHub, be sure to check out this GitHub training. Join experts Briana Swift and Jeremy Foster for a look at basic Git and GitHub concepts, and see why millions of Developers use the fast and flexible dev process fostered by GitHub. Take a look at…

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Support policy statement for Microsoft Graph

As new versions of the Microsoft Graph REST APIs and Microsoft Graph SDKs are released, earlier versions will be retired. Microsoft will declare a version as deprecated at least 24 months in advance of retiring an API or an SDK. So Microsoft Graph too follows the Microsoft Lifecycle Policy. When we increment the major version…

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Office 365 Devs: Deprecation of Outlook REST API v1.0

As you aware that the Version 1.0 of the Outlook REST API was launched in 2015 to provide API access to mail, calendar, contacts, and other data from Exchange Online. Later we came up with Outlook REST API v2.0 and Microsoft Graph, both of which provide richer features, and better performance and reliability than Outlook…

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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…