Which Splunk Server (s) need to be put in Maintenance mode before upgrading to 8.2.2.1 ? Thank u very much.

[SamHTexas]

Of the Servers LM, CM, SHC or Deployment server, which needs to be put in a maintenance mode before upgrading to 8.2.2.1 please? Thanks a million for your help.

[Stefanie]

CM must be placed into maintenance mode before upgrading.