...
Go to your “Entra ID” search for our ROOMZ application and create a new client secret, make sure to copy the value key. Navigate back to the ROOMZ portal and under setup > booking system > settings insert the new key.
https://roomzio.atlassian.net/wiki/spaces/SUP/pages/429850625/Booking+System#How611975392/Microsoft+365+Exchange+Online+FAQ#How-to-renew-the-client-secret-(For-application-permission)
Code: ErrorInvalidUser / Error no access / access denied
...