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1. PHP REQUIREMENT LINK : https://docs.espocrm.com/administration/installation/
2. Uncheck 'Auth' , 'Is Shared' as well as set 'From Name' to blank  in SMTP settings for outgoing emails() while manual installation) since we don't use smtp configuration.(No such option since 9.1.0, hence we explicitly keep, 'outboundEmailIsShared' => false and 'smtpAuth' => false in config.php)
3. Mysql 5.5 doesn't support full-text search for InnoDB tables. 5.6.4 and later versions do support. ( https://github.com/espocrm/documentation/blob/master/user-guide/text-search.md#full-text-search )
4. Keep "timeZone": "America\\/New_York" in sql for `preferences` table even though entry is blank in manual installation's sql(i.e "timeZone": "").
5. Select Espo theme while installing manually.
6. We have not given the upgrade utility because the script supports CLI and admin UI based upgrades only. They do not advise to upgrade manually hence we have not given.