Deprecation of Bacis Auth for Exchange server

[skmanja]

Looking for Answers for the following questions:-

1. Does this affect only online exchange server setup? or it affects both online as well as on-prem exchange server setup?

2. Does it affect only new tenants or new exchanges server setup created or it affects new as well as existing tenants?

3. If currently, it is affecting only new tenants? when can we expect it to be deprecated for existing tenants

4.Please share any latest documentations or announcement regarding the same

[#2]

Only the online version is impacted.
As long as you are using the legacy protocol, Microsoft is no longer going to disable it.
They will only disable the protocol if you are not using it.
This is documented in the latest article here: https://techcommunity.microsoft.com/t5/exchange-team-blog/basic-authentication-and-exchange-online-f...