Connection with Microsoft Exange does not work anymore

Goood Morning every one!

More then 6 months ago I created a Power bi file to get all the messages from a specific folder and filter for specific metrics (data ecc).

I used it till last week to create a table in excel for other analysis.

Today the file stopped to work, because it is not able to connect to the exchange (server?)... I am trying all the modification for the connection but without any success.

There something new in these feature or do you think that the problem is related to new security policie of my society?

Thank you for your time