It keeps this section of your IT environment stuck in the past, instead of adopting an Evergreen IT strategy, which is the future of your IT, i.e., Windows 10.(When Office 2019 launched, it had fewer features than Office 365.) The on-premise version keeps your organization from having the newest features and security updates.Microsoft is pouring more resources into the development of Office 365 as Microsoft is actively trying to convert its on-prem user base into cloud customers.While all of these issues seem overwhelming, and it appears easier to upgrade to the on-premise Office 2019, that is a flawed short-term strategy because: Rogue apps, plugins, add-ins with poorly written code (devices not properly locked down by IT to prevent download & install).Packaging maintaining current and future state i.e., used MSI, App-V virtual or streaming.Performance testing of click-to-run install (Office 365) vs.Memory drain from add-in order load (Can’t change load order on Outlook).Customized ribbon add-ins for UX by an enterprise behave differently.Custom apps that have the on-premise version path hard coded, i.e., Word template merged to Outlook (The Office 365 install folder path is different, resulting in multiple packages for same add-in).Incompatible macros, add-ins, and plugins in Excel, Outlook, etc.Below is a list of the most common issues you should be aware of:

While the benefits of upgrading to Office 365 have been covered many times, there is much less information available on the potential issues you might run into when upgrading and maintaining Microsoft’s cloud Office suite. Common Issues When Upgrading To Office 365

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