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We did an evaluation of several products which offered some type of Outlook Web Access protocol integration with Linux.
Owl was chosen because of the popularity of Thunderbird, which is already being used by many linux users, and Thunderbird is already provided as a supported application from the major linux desktop distributions which are recommended at SLAC (Ubuntu, CentOS). We list the alternatives here for completeness, and you are welcome to try them (and pay for them yourself) if you do not like using Owl with Thunderbird for some reason.
hiri. https://www.hiri.com
Pros: Nice interface; easy to set up and use. Easy access and use of Calendar, Email, and Contacts.
Cons: Cannot view full email headers. Not many configurable settings/preferences. No recent software updates. No response from developers/company.
Note: there is a free trial, but after the trial, there is a per-user cost.
ExQuilla. https://www.exquilla.com/ (older version of Owl).
The first generation Exchange add-on for Thunderbird. Same developer as Owl (see above). This product uses older technology, but still may work.
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