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.js debug: Office add-in throws “Sorry, we couldn’t load the app because your browser version is not supported”

One of the ISV pointed out that they see the following error with Office Add-ins that they develop. It throws error “Sorry, we couldn’t load the app because your browser version is not supported. Click here for a list of supported browser versions.” During the investigation we noticed the end user’s browser (Internet Explorer) is…

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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…

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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…

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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…

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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…


Guide: How to do the change management for Office 365 clients?

Daily i come across good number of customers/IT pros where they want to know more about the change management for Office 365 clients, so i am posting the related info here. As you aware the client applications that are included with Office 365 are released regularly with updates that provide new features and functionality together…


Private preview: Now access the Managed Access to Microsoft Graph Data

Now you can access the Managed Access to Microsoft Graph Data – Yes, you heard it correct. So you can use, Managed Access to Microsoft Graph Data is designed to give administrators new controls over the Office 365 data they provide to application developers who forge insights with that data. It include scenarios for Enterprises…

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[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…


Office 365 Developer – Get the Personal Contacts with Microsoft Graph API

As you aware Outlook contacts lets you store personal contacts’ data, and is part of the Outlook messaging hub in Office 365. Through Outlook, you can manage emails, schedule meetings, find information about users in an organization, initiate online conversations, share files, and collaborate in groups. So now with Microsoft Graph API you can get/pull…


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…


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. -…