It is necessary that your PC fulfils all the system requirements for efficient working of the software. Listed below are the minimum system requirements :
Operating System Support - Windows 10 or below editions
Processor - IntelĀ® Pentium 1 GHz processor (x86, x64) or equivalent (2.4 GHz is recommended)
Memory - 512 MB RAM (2GB is recommended)
Hard Disk Space - Minimum 100 MB space is required for installation
Supported Editions
Windows - Windows 10, 8.1, 8, 7, Vista and below
Zimbra -
Zimbra Desktop - 7.3, 7.2, 7.1, 7.0 and below
Zimbra Collaboration Server - 8.7, 8.6, 8.5 and below
Outlook - 2019, 2016, 2013, 2010, 2007, 2003 (both 64bit and 32bit editions supported)
Office 365 plans - Office 365 Enterprise, Office 365 Business Premium, Exchange Online, Office 365 Business Essentials
Note : Admin account of Office 365 must be used for Admin Account Migration