upgrade my domino server 8.0.1 to 8.5.2

I want to upgrade my domino server to 8.5.2 from 8.0.1. I have a mix of lotus clients from version 7 to 8.0.1. Some of the mail database templates are still mail7.ntf. What should be step by step guide to upgrade the server. What are the precaution need to be taken.
jobby1Asked:
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SysExpertCommented:
see
https://www.ibm.com/developerworks/lotus/documentation/domino/

as well as the redbooks for upgrade and deployment.

I hope this helps !

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SysExpertCommented:
tbsgadiCommented:
gusffCommented:
Hello,

I think the best documentation is here:

http://www-10.lotus.com/ldd/dominowiki.nsf/dx/UC1_TableofContents.htm

Here you´ll see important information about what to migrate first and what the supported configurations. I think that migrating 8.0.1 to 8.5.2.x will be easyer.

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