Recommendations for maintaining multi-server installs with different Zimbra versions
I am looking for recommendations for maintaining multi-server installs with different Zimbra versions. Basically, "yes this is possible for minor version diffs only" or a "no, this will cause everything to die horribly".
If we have 7 servers and need to upgrade all to the latest Zimbra release, this will take 2 to 3 days and so there will be a period where the 4.56 and 4.57 servers will need to be inter-operable.
Any recommendations or comments?