Is the Recoverable items folder cached into the OST file?

Question

Is the Recoverable items folder cached into the OST file? I'm concerned particularly with Litigation Hold. In the MS documentation it says: Litigation Hold preserves items in the Recoverable Items folder in the user's mailbox. Does it so locally (OST), server-only or both?

Answer 1

No, the Recoverable Items Folder is not cached in the ost.
https://learn.microsoft.com/en-us/exchange/security-and-compliance/recoverable-items-folder/recoverable-items-folder

Each user mailbox is divided into two subtrees: the IPM (interpersonal messaging) subtree, which contains the normal, visible folders such as Inbox, Calendar, and Sent Items and the non-IPM subtree, which contains internal data, preferences, and other operational data about the mailbox. The Recoverable Items folder resides in the non-IPM subtree of each mailbox. This subtree isn't visible to users using Outlook, Outlook on the web (formerly known as Outlook Web App), or other email clients.