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A more detailed description of the requirements, and a description of how to check whether the requirements are met, can be found at: https://docs.microsoft.com/en-us/office365/admin/manage/centralized-deployment-of-add-ins?view=o365-worldwide.
If It is possible to deploy the OC without an Office 365 ProPlus subscription isn't available, it is instead possible to publish the add-in to an app catalog with an on-premises SharePoint Server. However, using this option has two major drawbacks:
- The OC will not be available to Mac users.
- It is not possible to get a specialized ribbon for the add-in (the ribbon can be seen at Digizuite™ Office Connector 2.0 - 1. Installation and Configuration Guide). This makes it less convenient for users to open the OC.
It is therefore not recommended to use the Office Connector for regular Office versions, which aren't 365 subscriptions.
Note that . However, note that the OC does not fully support Office 2016 and earlier versions. Thus, deploying the OC to an app catalog with an on-premises SharePoint Server should It should therefore only be considered for Office 2019 and later.
If an Office 365 ProPlus subscription isn't available, installing the OC for all users in an organization will be a bit more cumbersome.