As customers prepare for the final phase of Exchange Web Services (EWS) retirement in Exchange Online, many are asking the same practical question: how can I prove that EWSAllowedAppIDs is working be...
Updated Oct 14, 2026
Version 5.0
Blog Post
Do I need to whitelist the Microsoft Power Query and Microsoft Office well-known apps that are still showing EWS activity or will Microsoft know enough to keep things running until they support Graph API?
Nino_Bilic
Microsoft
MicrosoftYou should allow list whatever is important for your business, even though we will also add things to your allow list based on your usage (as mentioned before). Now here is why you should do this, even if we fixed all of this tomorrow:
Many of those applications - even if fixed tomorrow - require updates to client machines. So, while in a service app, the change rolls out when it's made, changes to client apps on end user machines might roll at a different schedule. So to make sure - you should allow list what matters to your business, to give yourself the best chance of having no disruptions because that disruption could also come from Office client machines not taking updates as quickly as we release Office builds with fixes (as an example).