First time upgrading - checking my steps
Hi All Looking to do my first EV upgrade, normally this has been actioned by another colleague who has since retired. Currently we're on EV 12.1.2 and looking to go to 12.5.3. Our environment is: 4x Win2012 servers (2 x storage/task servers and 2 x indexing servers), SQL 2012 server, Storage is handled by CIF shares. We're currently running onprem Exchange 2016 servers. We don't use EV reporting, discovery or any smtp/journal archiving Pre-change: Confirm backups of application servers and SQL Confirm AV off Confirm disk space Run deployment scanner check Get new clients packaged ready to deploy Change Day: Stop all EV services and set to manual Check all MSMQ are empty Copy and backup EV folder forwebapp.ini and web.config files Upgrade all 4 servers but DO NOT reboot until all are done Run cmdlet Start-EVDatabaseUpgrade to upgrade SQL db 12.5.3 install on all 4 servers a) have I got the above steps correct? b) my previous colleague would also put the Vault Stores in Backup mode, is this necessary since I'm stopping the EV services and changing them to Manual startup for the duration? c) he also noted something aboutCheck Statistics have been dropped on Vault SQL Databases, what is this? d) Do I need to upgrade OWA extensions on each Exchange server as well? e) the client app deployment is handled by another team, does it matter if the server is 12.5.3 but the client is 12.1.2 for a short duration? f) any other step I'm missing? Thanks in advance.