We are currently using ADFS and ADFS WAP version 2.1 and recently we have observed increase frequency of potential attempts to our email accounts and resulting in the account being locked. After check with the Office365 support, we are suggested upgrade
to ADFS 4.0 with fresh configuration. Before start to upgrade to ADFS 2019, I have few queries need to clarify.
1. Can we start configure the new ADFS 2019 parallel with existing ADFS 2.1 and at the same time keep the ADFS 2.1 still running for users access, once the ADFS 2019 configured, we switch ADFS service to ADFS 2019?
2. Can we just configure one new ADFS 2019 and keep using ADFS WAP in 2.1? In another words, can we configure ADFS 2019 server first, if ADFS works fine, we continue to configure the ADFS 2019 WAP server?
3. If we stopped current ADFS 2.1 and start to configure the new ADFS 2019 server ,but finally the setup is failed, can we just restart ADFS 2.1 server continues the service without any impact?
Thank you