[Question][TheHive4][Synapse][Ews2Case] Curl problem "Operation not permitted"

[IzusaE]

Request Type

Hello,
I am currently installing thehive4, and more specifically Synapse and Ews2case.
Only I am currently experiencing a problem.

Work Environment

Question	Answer
OS version (server)	Debian
OS version (client)	Windows 10
Virtualized Env.	True
Dedicated RAM	4 GB
vCPU	2
TheHive version / git hash	4
Package Type	Debian
Database	Cassandra
Index type	Lucene
Attachments storage	Local
Browser type & version	Firefox

Question

When I run my curl 127.0.0.1:5000/ews2case command, I have a success: false (I do the command on my Debian server, which contain theHive)
In my logs I have the following:

2021-07-19 16:07:32,714 :: INFO :: workflows.Ews2Case.connectEws commence
2021-07-19 16:07:32,714 :: INFO :: common.common.getConf commence
2021-07-19 16:07:32,725 :: INFO :: objets.EwsConnector. getAccount démarre
2021-07-19 16:07:32,727 :: INFO :: objects.EwsConnector.scan commence
2021-07-19 16:07:33,855 :: INFO :: objects.TheHiveConnector.connect commence
2021-07-19 16:07:34,168 :: INFO :: objects.TheHiveConnector.searchCaseByDescription commence
2021-07-19 16:07:34,455 :: INFO :: objects.TheHiveConnector.craftCase commence
2021-07-19 16:07:34,456 :: INFO :: objects.TheHiveConnector.createCase commence
2021-07-19 16:07:34,652 :: ERREUR :: Échec de la création du dossier
2021-07-19 16:07:34,653 :: ERREUR :: Échec de la création du dossier à partir d'un e-mail
Traceback (appel le plus récent en dernier) :
Fichier "/root/Synapse/workflows/Ews2Case.py", ligne 55, dans connectEws
createdCase = theHiveConnector.createCase(case)
Fichier "/root/Synapse/workflows/objects/TheHiveConnector.py", ligne 82, dans createCase
augmenter ValueError(json.dumps(response.json(), indent=4, sort_keys=True))
Erreur de valeur : {
"message": "Opération non autorisée",
"type": "AuthorizationError"
}

And I can't seem to solve this problem.
To explain a little more the manipulations I was able to perform, here they are:
I created, on my tenant office 365, an account (eba) which has inside the mailbox a folder named TheHive (as requested in the configurations) in this folder, I have various unread emails that I want to transfer to thehive.
This famous folder, during the right click > permissions, I gave everyone the rights to read, modify, write, etc. to be sure that the problem does not come from there. Only that does not solve anything. Does anyone have any idea how to fix my problem?
Thank you in advance and good day