How to migrate from eM Client to Outlook?

Been on eM Client for four years, moving to Outlook because of a new job requirement. Local folders hold about 20GB of mail plus contacts and calendar.

eM Client stores everything in some internal database. What actually transfers and how?

eM Client keeps its data in a local database under %appdata%\eM Client, which nothing else reads. The transfer runs through its export function, so do this while eM Client is still installed and licensed.

1

In eM Client go to Menu, File, Export and choose Export to .eml files. Pick all local folders and export to a directory. The folder tree is recreated as subdirectories.

2

Export contacts separately: Menu, File, Export, Export contacts to .vcf. Same for the calendar as .ics.

3

Convert the EML directory tree to PST with an EML to PST converter, SysTools EML Converter for example, which keeps the directory structure as Outlook folders.

4

In Outlook import the PST via File, Open and Export, then import the vcf into Contacts and the ics into the Calendar.

Anything living on IMAP rather than in local folders does not need any of this. Add the same IMAP account to Outlook and it syncs down by itself. The export dance is only for eM Client local folders, so check which is which under Menu, Accounts before you start.

Half my mail turned out to be IMAP so that synced straight in. Exported and converted the local folders, all 20GB accounted for. Clean move.