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I have question if it's possible read calendar data from Zimbra server in Outlook without Zimbra Connector.
I have this case:
I need intergrate CRM with calendar into Zimbra and synchronize Zimbra with Outlook. I don't need write permission just read. Is this possible in Zimbra Open Source version without Zimbra Connector?
Bugzilla
Wiki
Source
Calendar Outlook sync and no connector 
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