HI , 

Currently we have single instance of IFS server running on Azure VM on windows server 2019. This IFS middleware server is connected to the utility servers (IFS TAS and Print Agent), Demand Plan servers and Oracle DB server (all on windows server 2019). 

At this point we have to bring down the application while doing the planned maintenance. So would like to understand what would be the best possible approach to patch the  the environment with zero or near zero downtime. 

Does anyone here have any such scenario and can you please provide some thoughts to further planning the solution? 

TIA.