Hello... I followed all the instructions, and allow in the authorization window the account and permissions do not error for the Microsoft side. But in OST appears an "invalid client" error. I double checked the info, and even put a wrong client id for testing (and Microsoft windows show error " Application with identifier 'xxxxx-xxx-xxx-xxxx' was not found in the directory" so I'm sure the "client Identifier" is well...
osTicket (v1.17-rc4) on centos 8