Templafy web add-ins (For MS Office on-prem, Online & Mac)

About this article

This article will explain what the Templafy Web add-ins are and which minimum Office and OS versions are required, as well as which browser is supported.

What are Templafy web add-ins?

Templafy Web add-ins are add-ins for Office 365. This means, that the add-ins can be installed on:

Office Online
Office for Mac
Office for Windows*

We highly recommend using Templafy Desktop and VSTO add-ins rather than web add-ins on PC as the end-user experience is better with VSTO add-ins.
Webview2 needs to be installed with elevated/administrator rights for Web Add-ins to function

Prerequisites for running Templafy web add-ins

Note: when using Templafy Web Add-ins it is generally recommended to run the latest version of Office.

Device

Office versions

Office 365 Version 1612, Pro Plus/Office 2019 (One time purchase)

Email Signature:

Support for 1.10 in Outlook on Windows which is available from Outlook version 2104 (build 13929.20296)

For internal/external support for 1.11 in Outlook on Windows which is available from Outlook version 2110 (build 14527.20226)

Mac

Office 365 Version 15.32, Pro Plus/Office 2019 (One time purchase)

Email Signature:

Support for 1.10 in Outlook on Mac is available only in the "New UI". Support for the new Mac UI is available from Outlook version 16.38.506.

As of 2021, only specific versions of office newer than Office 2016 are supported for Microsoft 365 connectivity. The list is available here.

Device	OS versions
PC	Vista, 7, 8, 8.1
Mac	High Sierra or newer

Device	Browser support
PC	Microsoft Internet Explorer 10 or newer
Mac	Safari 12.03 or newer

Support for Web add-in based on Operating Systems

Operating system	General support	Microsoft 365 Apps Support (1)	Task Pane support (2)	Event-based support (3)
Windows 7	❌	❌	❌	❌
Windows 8	❌	❌	❌	❌
Windows 8.1	❌	✅ -> ❌ (January 10, 2023)	❌	❌
Windows 10	✅	✅ -> ❌ (October 2025)	✅	✅ Version 1903 (Build 18362)
Windows 11	✅	✅	✅	✅
Windows Server 2008 R2	❌	❌	❌	❌
Windows Server 2012	❌	❌	❌	❌
Windows Server 2012 R2	❌	❌	❌	❌
Windows Server 2016	❌	✅ -> ❌ (October 2025)	✅October 2025	❌
Windows Server 2019	✅	✅ -> ❌ (October 2025)	✅ October 2025	✅ Version 1903
Windows Server 2022	✅	✅ -> ❌ (October 2026)	✅ October 2026	✅

* (✅ -> ❌) - end of support officially announced

(1) - Support for running Microsoft 365 Apps (Web Add-ins) on Desktop. Not having the support makes the Email Signature Web Add-in completely not working
(2) - Support for Task Pane interaction - when opening the "Email Signatures" task pane and manually inserting the signature. We refer to this as authenticated flow in Web add-in, as the user has to authenticate/be authenticated.
(3) - Support for Event-based actions. These include all the actions that are performed by us as a result of user actions in Outlook, without interacting with the Task Pane. We refer to this as an unauthenticated flow, as this works for 30 days after logging in in the task pane. As of now (Oct. 2022) there are 2 triggers: on a message being composed and on recipients being changed. The first one handles the automatic signature insertion, while the second one performs updating the signature for internal/external. Not having support for this makes our Web Add-in only work in authenticated flow

How can Templafy web add-ins be distributed?

Module and Library availability in Templafy

You can find more information on what is supported on PC, Mac, or Office Online here:

For Templafy Hive:
- Modules overview and availability
- Which templates and assets are available where?
For Templafy One:
- Templafy Add-ins side by side: PC, Mac and Office online

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