Puremessage exchange single server setup on exchange 2013 cu 23.
Can upgrade by running pmex64 4.0.4 directly? Any issue need to take note of?
Thanks for reaching out to the Sophos Community Forum.
The upgrade from Pure Message Exchange 4.0.2 to 4.0.4 is a direct upgrade which can be run over top of the existing installation. You can find further details and release note information on the following page. - https://downloads.sophos.com/readmes/pmex_404_rneng.html
I am not aware of any known issues with the upgrade, though you can find Sophos' full KIL list on the following page. A few are present but further steps are detailed within the document as well.- Known Issues List for Sophos Products