There are two types of archiving: local archiving and server-side archiving.

For local archiving, eM Client contains an Automatic Archiving feature which allows you to download all messages older than a selected number of days from the server and keep them stored on your local drive. These emails can be found in the Archive folder in the program’s left pane, below the accounts folders and Local Folders.

You can find this option under Menu > Settings > Mail > Automatic Archiving. It is necessary to set Archiving Scope under the Account Preferences section for the archiving to be performed.

Server-side archiving is available for all IMAP and Exchange accounts. The Archive folder will show up under the account's own folders and you can use the ‘Move to Archive’ button or shortcut to move messages from these accounts' folders to their specific Archive folder with one step.

This feature was originally only supported for Google accounts where the 'Move to Archive' option only removes the Inbox label, the same way it works on webmail, keeping the message in the All Mail folder.

Read more on our blog: Archive your emails easily with eM Client