Long email conversations with many attachments could take 30 to 60 seconds to open, and sometimes failed with an error. They now open normally.
Your team can open an email conversation with a long history and several attachments to review it and continue replying. The change addresses opening those larger threads; it does not require removing earlier messages or attachments from the conversation.
Select the email ticket from your inbox and wait for the thread to load. Review the messages and attachments, then use the reply box as usual. There is no new account setting to enable for this improvement.
Related guide: Onboarding: Understanding the Support Inbox.