How to merge MailStore archives

If you have recently upgraded to MailStore version 9 you may not be aware that the new maximum number of messages that an archive can contain has now been increased from 500,000 to  5,000,000 messages.

If you are like me and you have found yourself with a collection of much smaller MailStore message archives it is now much easier to merge these together into a smaller number of larger archives.

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