Microsoft Office Add-In Developer
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Migrating VSTO and COM Add-Ins to the Office Web Add-Ins Platform
If your organisation runs custom VSTO or COM add-ins, you have probably encountered a good deal of noise about deadlines...
The EWS Cutover Runbook: Your Go-Live Plan for the October 1 2026 Deadline
The clock now reads under 90 days. On 1 October 2026, Exchange Web Services stops serving Outlook add-ins, and any add-i...
From AppSource to Enterprise Procurement: Distributing Your Office Add-In to Large Customers
Every ISV that builds an Office Add-In eventually runs into the same uncomfortable truth: shipping working code is rough...
Escaping the Spreadsheet Shadow System: Excel Add-Ins for Audit and Compliance Platforms
Every GRC platform vendor knows the pattern, even if few say it out loud. The platform is the system of record — risk re...
The Final Sprint: Completing Your EWS to Microsoft Graph Migration Before October 2026
Four months remain before the EWS deprecation enforcement date of 1 October 2026. For Outlook add-in development teams w...
Building Custom PowerPoint Add-Ins for Enterprise Presentations
PowerPoint is the universal language of business communication. Financial results, strategic plans, client proposals, pr...
EWS to Microsoft Graph: The API Migration Every Outlook Add-In Developer Must Complete by October 2026
Microsoft has confirmed that Exchange Web Services will cease to accept connections from Outlook add-ins on 1 October 20...
Microsoft 365 Extensibility in 2026: From Office Add-Ins to Intelligent Agents
The landscape of Microsoft 365 extensibility has changed more in the second half of 2025 than in any comparable period s...
Building Microsoft 365 Copilot Agents with MCP: A Developer's Guide to Artificial Intelligence
In December 2025, Microsoft announced that Microsoft 365 Copilot declarative agents now support the Model Context Protoc...
Ignite 2025: What the Office Add-In Announcements Mean for Enterprise Developers
Microsoft Ignite 2025 has delivered the most significant set of announcements for Office extensibility since the introdu...
Custom Excel Add-In Development: Building Spreadsheet Solutions That Scale
Excel remains the most widely used business application in the world. From financial modelling and supply chain planning...
Event-Based Office Add-In Activation: Automating Document Workflows
The traditional model for Microsoft Office add-ins has always been reactive. A user clicks a button, opens a task pane,...
Integrating Copilot Agents with Office Add-In: What Developers Need to Know
Microsoft Build 2025 delivered what is arguably the most significant shift in the Office add-in development model since...
What Are Microsoft Office Add-Ins?
What Are Microsoft Office Add-Ins? Microsoft Office Add-Ins come in three ...
Enhancing Legal Software Development with Custom Word Add-Ins
Explore more about how you can streamline legal software development with custom Word add-ins. Reach out to us for custo...
Developing Custom Microsoft Outlook Add-Ins to Integrate with CRM Systems
Explore how to develop custom Microsoft Outlook add-ins to integrate with CRM systems and how McKenna Consultants can he...
Building an MS Outlook Add-In: Part Three - Testing and Approval
Learn about testing and approval regarding building an MS Outlook add-in. Contact us to discuss your Microsoft needs.
Building an MS Outlook Add-In: Part Two - Building an Add-In with the Microsoft Graph API
Learn about building an MS Outlook add-in. If you need help with your Outlook add-in and CRM integration project, please...
Enhancing CRM Integration: Building an MS Outlook Add-In with the Microsoft Graph API
Discover more about building an MS Outlook Add-In with the Microsoft Graph API. Contact McKenna to discuss this in more...
Using MVPs in Software Development
An MVP is a piece of software with just enough features to function. In software development, MVPs are great for idea va...
What Are Microsoft Outlook Add-Ins and How Do They Work?
Discover our easy how-to guide on Microsoft Outlook Add-Ins and how they work, as they can be complexed to implement. Ex...
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