Unfortunately you can't import data from an old /opt/zimbra/ folder to a running server..
If you really can't re-activate the old server in order to migrate the data in it, my suggestion is to follow this steps:
- Setup an identical copy of your server. This means installing the same Zimbra version on the same OS over the same architecture. Remember that it must be a PERFECT copy of your old server in order for this procedure to work, so you must also configure the new server just like the old.
- Once the new server is ready
stop Zimbra with
copy the old /opt/zimbra/ folder in the new server with a different name
su - zimbra -c "zmcontrol stop"
rename the /opt/zimbra/ folder of the new server
rename the old folder to /opt/zimbra/
mv /opt/zimbra /opt/zimbra.orig
restart Zimbra and hope it works
mv /opt/zimbra.old /opt/zimbra
Now just follow one of the many migration guides to move all the data from the "copy" server to the production one.
su - zimbra -c "zmcontrol start"
If you need further help on choosing a migration method, I unfortunately tried a lot of them so feel free to ask
Cine - Community Manager - ZeXtras