-----BEGIN PGP SIGNED MESSAGE----- Hash: SHA1 Hi! Am 18.07.2018 um 20:27 schrieb Johnny Hughes: [...] > > But are you guys really telling you think the calendaring / scheduling for individual users and the main corporate account, etc. .. are working well enough with any Linux solution. > [...] Yes, I do think so! :-) At least for up to about 100 users (that's the size of the businesses we usually have as our customers) We implemented Linux-based groupware solutions for those clients in the past (and hopefully will do in the future) based on the following main components: *) Linux (CentOS, SLES, OpenSUSE, depending on customers preferences) *) Cyrus IMAP *) Sendmail [sic] *) OpenLDAP *) SOGO (nobody mentioned SOGO yet, but IMHO it works very well and integrates perfectly into the Linux software stack!) *) Fusiondirectory (was GOSa) *) And the usuall suspects like ClamAV, SpamAssassin, ... This solution provides: *) Basic Mail (Relay, Server, Storage, ...) *) Webmail (through SOGO) *) Calendar and address book Web UI *) Calendar and address book for a desktop client like Thunderbird (CalDAV, CardDAV) *) Web-Based Admin UI for both admins and users (to manage their own accounts) *) Integration with smartphones (mail, calendar, address book) *) Features like shared mailboxes, shared calendars, ... *) Easy integration with all typical Unix/Linux services (Fileserver, Webserver, VPN, ...) I have no experience with Exchange (and I refuse to get any), but I have "some" with Unix/Linux (since 1990. Yes I'm old ;-) For me the above mentined software stack "just works" and it does for the more advanced business use case, too. I can't say anything about solutions for thousands of users, though, so YMMV! Regards - - andreas - -- Andreas Haumer | mailto:andreas at xss.co.at *x Software + Systeme | http://www.xss.co.at/ Karmarschgasse 51/2/20 | Tel: +43-1-6060114-0 A-1100 Vienna, Austria | Fax: +43-1-6060114-71 -----BEGIN PGP SIGNATURE----- Version: GnuPG v2.0.22 (GNU/Linux) iD8DBQFbT5A2xJmyeGcXPhERArplAJ9GILNWEm0S9LlvkNGE/LTUg61ylwCgkkc1 SQvs/o/neTjsio8RmSnfSwc= =dX5+ -----END PGP SIGNATURE-----