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Based on this question regarding enhanced permission support in filesystems, what is the best permissions + directory and mail stack to compare against Active Directory on NTFS with Exchange?

I'm familiar with OpenLDAP for directory services, and Scalix for email and calendaring. Are there other good competitors in this arena? Novell's NetWare would have been my answer a decade ago, but with that having pretty much disappeared, I haven't seen a good replacement, outside of "perl-and-duct-tape".

ie - is there an integrated packaging of these (or other) toolsets?

The thrust of this question is to see how plausible a completely AD-free environment is, with a quality calendar, email, and directory services functionality.

It can run on Mac OS X, Linux, or Windows - I'm just very interested to see what others have done/seen/used in this area.

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related question - serverfault.com/questions/5282 –  warren Nov 15 '09 at 16:05
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I am not sure I would count on scalix any more. Their last forum post which is moderated to post was in july of last year. I have been looking for the community files as thier website hasen't worked for me in over 6 months to get new files. –  Kendrick Jun 10 '13 at 23:32
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3 Answers

up vote 5 down vote accepted

As far as Directory Services go, you've allready mentioned the main competitor to AD, Open LDAP. A couple more I know of are:

As far as Exchange alternatives go, you might want to look at this question but some of the most popular are:

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I've used Open-Xchange in years past and it was pretty good back then. Zimbra looked very promising, but never got the chance to deploy it. –  Brian Knoblauch Nov 25 '09 at 13:20
    
freeIPA is I believe the successor RH directory services. –  Kendrick Jun 10 '13 at 23:31
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NetWare may have disappeared (almost), but eDirectory and GroupWise are still very much around, and will run quite happily on either Server 200* or Linux.

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OES2 from Novell is the replacement for Netware, and it maintains the NSS filesystem on Linux (SLES Specifically) that has excellent ACL and inheritance abilities.

eDirectory is a good competitor to Active Directory for directory services.

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I migrated my company from Netware to Microsoft about 5 years ago. Netware had a rockin directory service. If only they'd had the aggressive marketing tactics that MS had... –  GregD Nov 25 '09 at 13:40
    
Totally agree. They really explored and defined much of that space with what was in many ways a superior and more stable product than MS's equivalent offering at the time. It's a shame that lesser marketing is what it came down to. –  Brian Cline Dec 14 '09 at 18:01
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