| Web collaboration and productivity |
| AJAX Mail & Address Book |
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| Basic search |
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| Tags |
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| Sharing |
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| Basic/Enterprise Zimlets |
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| AJAX Calendar |
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| Conversations |
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| Attachment search |
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| HTML attachment rendering |
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| Resource/group scheduling |
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| AJAX Documents |
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| Instant Messaging |
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| Tasks and Briefcase |
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| Administration & TCO |
| Web/CLI administration |
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| Integrated Anti-Spam / Anti-Virus |
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| Online backup/restore |
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| Clustering/HA* |
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| Storage management |
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| Rebranding |
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| Web/phone support |
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| Advertising Support |
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| Domain-level management |
| Multi-domain support |
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| Domain-level administration |
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| Domain-level branding |
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| External client compatibility |
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| POP/IMAP |
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| Zimbra Desktop for Windows, Mac and Linux |
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| iPhone Email, Contact, Calendar sync |
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| Outlook/MAPI sync |
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| Apple iSync |
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| Mobility |
| Zimbra Mobile (optional) |
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| Blackberry support (optional) |
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