Customer used to have an on-prem exchange server 12 months ago. This was migrated to O365, but their network was still on a 2003 server, so AD sync was never configured. We want to get this set up and working now though, for password sync mainly, but maybe for user-creation also.
Online instructions are quite lengthy, so after your recommendations. Is it worth installing the "Essentials Experience" just so that I can use the O365 features within it, or should i be going the hole hog and doing it properly?
The O365 information is more current than the AD config, which has now been upgraded to 2012 r2 standard. They are using a domain "company.local" also, which has not yet be changed. Will this cause issues?
O365 is a 15 user environment, with about 100 distribution groups.
AD only has the users configured, and not their group memberships, telephone numbers or job titles (used for email signature generation)
Exclaimer is used to generate email signatures straight from O365.