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zimbra 8.6 to 8.8 upgrade ZCO question

Posted: Mon May 20, 2019 10:22 am
by bit111
Hi,

I am about to upgrade Zimbra Network Edition 8.6 running on Centos 7, to 8.8 latest, but should know what will happen to my existing outlook clients (ZCO) ?
Should it be ZCO upgraded before server upgarde or ZCO 8.6 will continue working with Zimbra 8.8 ?