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All maintenance operations on WCS include data backup, restore, upgrades, services start and stop, and so on. For the purposes of this guide, all maintenance operations will be left to Chapter 4 of the official configuration guide:
WCS Configuration Guide, Chapter 4: www.cisco.com/en/US/customer/docs/wireless/wcs/7.0MR1/configuration/guide/tasks.html
As a side note, WCS allows you to perform maintenance operations such as software downloads and upgrades for controllers, the MSE, and access points. All the information on these maintenance tasks are detailed in the corresponding sections of the official guide to configure controllers, APs, and the MSE.
WCS supports several functions to give you a detailed troubleshooting of wireless clients.