Recently, we observed that most of users in our organization complaining after Microsoft office 2019 upgrade while opening Excel to PI datalink 2019 below error message shown. If we click on NO then excel crashes or if we click Yes the it disables Datalink addin. Other than reinstalling PI datalink or repairing Office installation any solution available for this. Also, in many posts it was recommended to upgrade to PI datalink 2019, but we have observed the same issue with Pi datalink 2019 in Office 2019 environment. Note: checked after ensuring loading behavior(Set to 3) from registry.