Microsoft has announced that effective October 1, 2022, they will begin to permanently disable Basic Auth in all tenants. RapidIdentity customers that utilize the RapidIdentity Exchange Agent will be required to make updates prior to this change. You can read more about the change on the Microsoft Blog at these locations:
https://learn.microsoft.com/en-us/exchange/clients-and-mobile-in-exchange-online/deprecation-of-basic-authentication-exchange-online
https://techcommunity.microsoft.com/t5/exchange-team-blog/basic-authentication-and-exchange-online-september-2021-update/ba-p/2772210
All RapidIdentity customers running the RapidIdentity Exchange Agent to access Office365 will need to perform the following: (If you are not sure what your RapidIdentity Exchange Agent accesses this help article will help you check)
Upgrade RapidIdentity Exchange Agent server to the latest version 2022.7.15
Update Action Sets from Microsoft Basic to Modern Authentication
For additional assistance with upgrading your Exchange Agent or Action Sets, please enter a Support Case. PLEASE NOTE: In order to properly update these credentials, our Support Engineer will need to work with your team in order to access your Microsoft Azure Console and your on-premise Exchange Agent Server.