Forum Discussion

DominikA9522's avatar
DominikA9522
Brass Contributor
Dec 07, 2023

EWS Connection is not working anymore

Hello all,

 

we're using the OnTime Group calender https://ontimesuite.com/resources/microsoft/documentation/ for additional functions for Exchange Online.

 

This solutions worked for the last months.

Starting with Tuesday 05th December this tool stopped working because the user synchronisation via EWS is not working anymore.

 

 

The tools connects via an Enterprise Application and an Impersination user.

 

We get following EWS Respsone when trying to sync a Microsoft 365 group or a distribution list:

 

 

 

 

I tested the same scenario with the OnTime Server with a developer tenant and there it works.

 

We also tried to resolve Distribution lists via EWS Editor it works well in the Dev Tenant but not in our Prod Tenant.. 

 

Do you have any idea why the Nameresolution isn't working anymore?

What can we check? 

 

 

Thank you very much

Resources