I have worked on Microsoft graph Api SDK for accessing shared mailbox using client credentials. The code which i have written was working fine for past one and half year in production. I have given all the delegated permissions in app which I have created in Azure AD. I have also made the mailboxes has shared in exchange admin center. I have also tried by giving permission to mailbox folder using outlook desktop application.
Though I am not able to access my shared mailbox with the code I have written. Kindly help me to solve this problem. Is there any update in the headers that I have to proceed with or is there any other permission i have to provide in azure active directory or is there any update in the sdk which i need to use.
Kindly help me to solve the situation.