I'm using Centos 6 and Zimbra 8.7.4 with multiple servers
Recently, I updated zimbra to 8.8.15 P32 (I have just download package zcs-8.8.15_GA_3869.RHEL6_64.20190918004220.tgz from zimbra.com)
I updated successfully on all server (Ldap -> mta -> proxy -> mailbox), but finally, I check version:
[zimbra@mail1 ~]$ zmcontrol -v
Release 8.8.15_GA_3869.RHEL6_64_20190917004220 RHEL6_64 FOSS edition, Patch 8.8.15_P28.
So why I can't upgrade to P32? (I cannot upgrade to Centos 7 because data in my mailbox very big (11TB), so It will down very long time when I migrate to the new server)