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We are planning to upgrade and migrate from the old server with Windows 2003 and SmarterMail 2.6 to the new server with 2012 R2 and SmarterMail 13. After some research I found the following:
Based on this, can we perform in-place upgrade existing installation of SmarterMail 2.6 to 7? Or should there be another step upgrade before 7? Also, where can we download previous versions? Please advise.